feat: exposure actuator endpoints to improve observability (#4898)

#### What type of PR is this?
/kind feature
/area core
/milestone 2.11.x

#### What this PR does / why we need it:
暴露 Actuator 指标端点以便监控服务状态

暴露了 Actuator 端点并提供角色模板，用户可创建 PAT 用于获取 Halo 运行状态数据或分配给其他用户

#### Which issue(s) this PR fixes:
Fixes #4894

#### Does this PR introduce a user-facing change?
```release-note
暴露 Actuator 指标端点以便监控服务状态
```

application/src/main/resources/application.yaml

@@ -64,7 +64,7 @@ management:
   endpoints:
     web:
       exposure:
-        include: ["health", "info", "startup", "globalinfo", "logfile", "shutdown", "restart"]
+        include: "*"
   endpoint:
     shutdown:
       enabled: true

application/src/main/resources/extensions/role-template-actuator.yaml

@@ -0,0 +1,14 @@
+apiVersion: v1alpha1
+kind: "Role"
+metadata:
+  name: role-template-actuator
+  labels:
+    halo.run/role-template: "true"
+  annotations:
+    rbac.authorization.halo.run/module: "Actuator Management"
+    rbac.authorization.halo.run/display-name: "Actuator Manage"
+    rbac.authorization.halo.run/ui-permissions: |
+      ["system:actuator:manage"]
+rules:
+  - nonResourceURLs: [ "actuator", "/actuator/*" ]
+    verbs: [ "get" ]