Migrate vue components to setup (#32329)

Migrated a handful Vue components to the `setup` syntax using
composition api as it has better Typescript support and is becoming the
new default in the Vue ecosystem.

- [x] ActionRunStatus.vue    
- [x] ActivityHeatmap.vue
- [x] ContextPopup.vue       
- [x] DiffFileList.vue
- [x] DiffFileTree.vue       
- [x] DiffFileTreeItem.vue    
- [x] PullRequestMergeForm.vue
- [x] RepoActivityTopAuthors.vue  
- [x] RepoCodeFrequency.vue
- [x] RepoRecentCommits.vue
- [x] ScopedAccessTokenSelector.vue

Left some larger components untouched for now to not go to crazy in this
single PR:
- [ ] DiffCommitSelector.vue  
- [ ] RepoActionView.vue
- [ ] RepoContributors.vue
- [ ] DashboardRepoList.vue  
- [ ] RepoBranchTagSelector.vue

web_src/js/index.ts

@@ -2,7 +2,6 @@
 import './bootstrap.ts';
 import './htmx.ts';
 
-import {initRepoActivityTopAuthorsChart} from './components/RepoActivityTopAuthors.vue';
 import {initDashboardRepoList} from './components/DashboardRepoList.vue';
 
 import {initGlobalCopyToClipboardListener} from './features/clipboard.ts';
@@ -42,7 +41,7 @@ import {initRepoTemplateSearch} from './features/repo-template.ts';
 import {initRepoCodeView} from './features/repo-code.ts';
 import {initSshKeyFormParser} from './features/sshkey-helper.ts';
 import {initUserSettings} from './features/user-settings.ts';
-import {initRepoArchiveLinks} from './features/repo-common.ts';
+import {initRepoActivityTopAuthorsChart, initRepoArchiveLinks} from './features/repo-common.ts';
 import {initRepoMigrationStatusChecker} from './features/repo-migrate.ts';
 import {
   initRepoSettingGitHook,