feat: enable asynchronous resolving for UI extension points

[ruibaby]

What type of PR is this?

/area ui
/kind feature
/milestone 2.16.x

What this PR does / why we need it:

优化 UI 部分的扩展点获取实现，让部分扩展点支持异步获取，之前的实现与文档不符。

比如：

import { definePlugin } from "@halo-dev/console-shared";
import axios from "axios";

export default definePlugin({
  components: {},
  routes: [],
  extensionPoints: {
    "attachment:selector:create": async () => {
      const { data } = await axios.get(
        "/apis/v1alpha1/fake.halo.run/attachments/selectors"
      );

      return data;
    },
  },
});

Which issue(s) this PR fixes:

Fixes #6008

Does this PR introduce a user-facing change?

优化 UI 部分的扩展点获取实现，让部分扩展点支持异步获取。

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.13%. Comparing base (5fdf6c0) to head (174daea).
Report is 216 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #6018      +/-   ##
============================================
- Coverage     56.91%   56.13%   -0.78%     
- Complexity     3319     3515     +196     
============================================
  Files           587      621      +34     
  Lines         18968    20915    +1947     
  Branches       1401     1460      +59     
============================================
+ Hits          10795    11740     +945     
- Misses         7594     8582     +988     
- Partials        579      593      +14     

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[guqing]

/lgtm

[JohnNiang]

/approve

[f2c-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JohnNiang

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• ui/OWNERS [JohnNiang]

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