#### What type of PR is this?
/kind improvement
/area core
/milestone 2.9.x
#### What this PR does / why we need it:
- Removes dependency `cn.shenyanchao.ik-analyzer:ik-analyzer:9.0.0` due to no significant effect for searching result.
- Customize our own analyzer with StandardTokenizer, HTMLStripCharFilter and LowerCaseFilterFactory.
Please be aware of that the default field to search has become to `content` instead of `title` + `excerpt` + `content`. If someone wants to search title only, use `title: halo` as query string. For more details, please refer to <https://lucene.apache.org/core/9_5_0/queryparser/org/apache/lucene/queryparser/flexible/standard/StandardQueryParser.html>.
#### Which issue(s) this PR fixes:
Fixes https://github.com/halo-dev/halo/issues/4455
#### Special notes for your reviewer:
#### Does this PR introduce a user-facing change?
```release-note
优化本地搜索引擎
```
#### What type of PR is this?
/kind feature
/area core
#### What this PR does / why we need it:
This PR adds dependency [spring-boot-starter-cache](https://docs.spring.io/spring-boot/docs/current/reference/html/io.html#io.caching) as cache framework and [caffeine](https://github.com/ben-manes/caffeine/wiki) as cache implementation to cache template rendering result.
By default, we disable the cache feature. If you want to enable it, please try to configure properties like this:
```yaml
halo:
cache:
disabled: false
```
#### Which issue(s) this PR fixes:
Fixes#2827
#### Special notes for your reviewer:
1. Start Halo
2. Browse any page twice
3. See the difference in request times
#### Does this PR introduce a user-facing change?
```release-note
支持模板渲染结果缓存
```
#### What type of PR is this?
/kind feature
/area core
#### What this PR does / why we need it:
This PR introduces https://github.com/resilience4j/resilience4j to archive the feature. The login endpoint has limited login failures at a rate of 3 per minute.
See https://github.com/halo-dev/halo/issues/4044 for more.
#### Which issue(s) this PR fixes:
Fixes https://github.com/halo-dev/halo/issues/4044
#### Special notes for your reviewer:
1. Start Halo.
2. Try to login with incorrect credential 4 times
3. Check the response.
#### Does this PR introduce a user-facing change?
```release-note
增加登录失败次数限制功能
```
#### What type of PR is this?
/kind improvement
/area core
#### What this PR does / why we need it:
Replace R2DBC MySQL driver to io.asyncer:r2dbc-mysql. See https://github.com/halo-dev/halo/issues/3804 for more.
Please note that there will be an error like below when starting up Halo on MacOS:
```java
2023-05-09T14:24:45.161+08:00 ERROR 4668 --- [ restartedMain] i.n.r.d.DnsServerAddressStreamProviders : Unable to load io.netty.resolver.dns.macos.MacOSDnsServerAddressStreamProvider, fallback to system defaults. This may result in incorrect DNS resolutions on MacOS. Check whether you have a dependency on 'io.netty:netty-resolver-dns-native-macos'. Use DEBUG level to see the full stack: java.lang.UnsatisfiedLinkError: failed to load the required native library
```
After manual test, I haven't found any problems caused by the error. And this only occurs on MacOS when developing.
#### Which issue(s) this PR fixes:
Fixes https://github.com/halo-dev/halo/issues/3804
#### Special notes for your reviewer:
Steps to test:
1. Start up a MySQL server, e.g.:
```bash
docker run -it --rm --name halodb -p 3306:3306 -e MYSQL_ROOT_PASSWORD=openmysql -e MYSQL_DATABASE=halo mysql:8
```
3. Start Halo with mysql profile active
```bash
make -C console dev
./gradlew bootRun --args="--spring.profiles.active=dev,mysql --halo.plugin.runtime-mode=deployment"
```
5. Check the functionality of Halo
#### Does this PR introduce a user-facing change?
```release-note
替换 R2DBC MySQL 驱动为：io.asyncer:r2dbc-mysql
```
#### What type of PR is this?
/kind feature
/area core
#### What this PR does / why we need it:
Use Gradle plugin `maven-publish` to publish Halo modules(`platform.application`, `platform.plugin` and `api`) to Maven central repository.
```bash
# Try to publish to Maven local repository.
./gradlew publish
# Really publish to Maven central repository.
./gradlew -Prelease publish -PossrhUsername=username -PossrhPassword=password
```
Note that currently we only support manually publishing.
#### Which issue(s) this PR fixes:
Fixes https://github.com/halo-dev/halo/issues/2730
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/kind cleanup
/area core
#### What this PR does / why we need it:
This PR totally refactor project structure for a better plugin development. Now we can maintain and publish api and platform modules at Halo application side, which will be references by plugins.
Currently, we can execute command `./gradlew clean publish` to publish api and platform modules into **local** Maven repository, so that we can refer these dependencies (`run.halo.tools.platform:plugin:2.4.0-SNAPSHOT` and `run.halo.app:api:2.4.0-SNAPSHOT`) in plugin projects.
I will make another pull request to publish api library and platforms into Maven central repository.
**Modules explanation**:
- API module contains common classes which might be used by plugins.
- Plugin Platform module contains dependency declarations of other plugin API modules.
- Application Platform module contains dependency declarations application module might uses.
If we want to build application only(exclude check and jar), we have to execute the command below:
```bash
./gradlew clean :application:build -x :application:check -x :application:jar
```
The executable Jar will be generated at folder `application/build/libs/`.
If we want to build a Docker image, we could execute the command below:
```bash
docker build -t johnniang/halo:project-structure .
# Test the Docker image
docker run -it --rm -p8090:8090 johnniang/halo:project-structure
```
#### Which issue(s) this PR fixes:
Fixes https://github.com/halo-dev/halo/issues/2730
#### Special notes for your reviewer:
#### Does this PR introduce a user-facing change?
```release-note
重构项目结构
```
John Niang