Require approval to run actions for fork pull request (#22803)

Currently, Gitea will run actions automatically which are triggered by
fork pull request. It's a security risk, people can create a PR and
modify the workflow yamls to execute a malicious script.

So we should require approval for first-time contributors, which is the
default strategy of a public repo on GitHub, see [Approving workflow
runs from public
forks](https://docs.github.com/en/actions/managing-workflow-runs/approving-workflow-runs-from-public-forks).

Current strategy:

- don't need approval if it's not a fork PR;
- always need approval if the user is restricted;
- don't need approval if the user can write;
- don't need approval if the user has been approved before;
- otherwise, need approval.

https://user-images.githubusercontent.com/9418365/217207121-badf50a8-826c-4425-bef1-d82d1979bc81.mov

GitHub has an option for that, you can see that at
`/<owner>/<repo>/settings/actions`, and we can support that later.

<img width="835" alt="image"
src="https://user-images.githubusercontent.com/9418365/217199990-2967e68b-e693-4e59-8186-ab33a1314a16.png">

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

web_src/js/components/RepoActionView.vue

@@ -3,7 +3,10 @@
     <div class="action-view-header">
       <div class="action-info-summary">
         {{ run.title }}
-        <button class="run_cancel" @click="cancelRun()" v-if="run.canCancel">
+        <button class="run_approve" @click="approveRun()" v-if="run.canApprove">
+          <i class="play circle outline icon"/>
+        </button>
+        <button class="run_cancel" @click="cancelRun()" v-else-if="run.canCancel">
           <i class="stop circle outline icon"/>
         </button>
       </div>
@@ -97,6 +100,7 @@ const sfc = {
         link: '',
         title: '',
         canCancel: false,
+        canApprove: false,
         done: false,
         jobs: [
           // {
@@ -173,6 +177,10 @@ const sfc = {
     cancelRun() {
       this.fetchPost(`${this.run.link}/cancel`);
     },
+    // approve a run
+    approveRun() {
+      this.fetchPost(`${this.run.link}/approve`);
+    },
 
     createLogLine(line) {
       const div = document.createElement('div');
@@ -303,7 +311,15 @@ export function initRepositoryActionView() {
     cursor: pointer;
     transition:transform 0.2s;
   };
-  .run_cancel:hover{
+  .run_approve {
+    border: none;
+    color: var(--color-green);
+    background-color: transparent;
+    outline: none;
+    cursor: pointer;
+    transition:transform 0.2s;
+  };
+  .run_cancel:hover, .run_approve:hover {
     transform:scale(130%);
   };
 }