Remove all direct references to font-awesome (#24448)

- Related #10410
- I had to add an SVG for an empty checkbox
primer/octicons#942

# Before

![image](https://user-images.githubusercontent.com/20454870/235374683-13f355c3-1245-40db-adda-4c710fc80288.png)

# After

![image](https://user-images.githubusercontent.com/20454870/235374655-cc637132-f314-424d-9243-13d45b8915d5.png)

---------

Signed-off-by: Yarden Shoham <git@yardenshoham.com>

web_src/js/features/comp/ComboMarkdownEditor.js

@@ -8,6 +8,7 @@ import {handleGlobalEnterQuickSubmit} from './QuickSubmit.js';
 import {emojiString} from '../emoji.js';
 import {renderPreviewPanelContent} from '../repo-editor.js';
 import {matchEmoji, matchMention} from '../../utils/match.js';
+import {svg} from '../../svg.js';
 
 let elementIdCounter = 0;
 
@@ -218,7 +219,7 @@ class ComboMarkdownEditor {
           cm.replaceSelection(`\n- [ ] ${cm.getSelection()}`);
           cm.focus();
         },
-        className: 'fa fa-square-o',
+        icon: svg('gitea-empty-checkbox'),
         title: 'Add Checkbox (empty)',
       },
       'gitea-checkbox-checked': {
@@ -227,15 +228,15 @@ class ComboMarkdownEditor {
           cm.replaceSelection(`\n- [x] ${cm.getSelection()}`);
           cm.focus();
         },
-        className: 'fa fa-check-square-o',
+        icon: svg('octicon-checkbox'),
         title: 'Add Checkbox (checked)',
       },
       'gitea-switch-to-textarea': {
         action: () => {
           this.userPreferredEditor = 'textarea';
           this.switchToTextarea();
         },
-        className: 'fa fa-file',
+        icon: svg('octicon-file'),
         title: 'Revert to simple textarea',
       },
       'gitea-code-inline': {
@@ -249,7 +250,7 @@ class ComboMarkdownEditor {
           }
           cm.focus();
         },
-        className: 'fa fa-angle-right',
+        icon: svg('octicon-chevron-right'),
         title: 'Add Inline Code',
       }
     };

web_src/js/svg.js

@@ -44,20 +44,30 @@ import octiconOrganization from '../../public/img/svg/octicon-organization.svg';
 import octiconTag from '../../public/img/svg/octicon-tag.svg';
 import octiconGitBranch from '../../public/img/svg/octicon-git-branch.svg';
 import octiconRss from '../../public/img/svg/octicon-rss.svg';
+import octiconCheckbox from '../../public/img/svg/octicon-checkbox.svg';
+import giteaEmptyCheckbox from '../../public/img/svg/gitea-empty-checkbox.svg';
 
 const svgs = {
+  'octicon-archive': octiconArchive,
   'octicon-blocked': octiconBlocked,
+  'octicon-checkbox': octiconCheckbox,
   'octicon-check-circle-fill': octiconCheckCircleFill,
   'octicon-chevron-down': octiconChevronDown,
+  'octicon-chevron-left': octiconChevronLeft,
   'octicon-chevron-right': octiconChevronRight,
   'octicon-clock': octiconClock,
   'octicon-copy': octiconCopy,
   'octicon-diff-added': octiconDiffAdded,
   'octicon-diff-modified': octiconDiffModified,
   'octicon-diff-removed': octiconDiffRemoved,
   'octicon-diff-renamed': octiconDiffRenamed,
+  'gitea-double-chevron-left': giteaDoubleChevronLeft,
+  'gitea-double-chevron-right': giteaDoubleChevronRight,
+  'gitea-empty-checkbox': giteaEmptyCheckbox,
   'octicon-file': octiconFile,
   'octicon-file-directory-fill': octiconFileDirectoryFill,
+  'octicon-filter': octiconFilter,
+  'octicon-git-branch': octiconGitBranch,
   'octicon-git-merge': octiconGitMerge,
   'octicon-git-pull-request': octiconGitPullRequest,
   'octicon-issue-closed': octiconIssueClosed,
@@ -68,29 +78,23 @@ const svgs = {
   'octicon-meter': octiconMeter,
   'octicon-milestone': octiconMilestone,
   'octicon-mirror': octiconMirror,
+  'octicon-organization': octiconOrganization,
+  'octicon-plus': octiconPlus,
   'octicon-project': octiconProject,
   'octicon-repo': octiconRepo,
   'octicon-repo-forked': octiconRepoForked,
   'octicon-repo-template': octiconRepoTemplate,
+  'octicon-rss': octiconRss,
+  'octicon-search': octiconSearch,
   'octicon-sidebar-collapse': octiconSidebarCollapse,
   'octicon-sidebar-expand': octiconSidebarExpand,
   'octicon-skip': octiconSkip,
+  'octicon-star': octiconStar,
   'octicon-sync': octiconSync,
+  'octicon-tag': octiconTag,
   'octicon-triangle-down': octiconTriangleDown,
   'octicon-x': octiconX,
-  'octicon-x-circle-fill': octiconXCircleFill,
-  'octicon-filter': octiconFilter,
-  'octicon-plus': octiconPlus,
-  'octicon-search': octiconSearch,
-  'octicon-archive': octiconArchive,
-  'octicon-star': octiconStar,
-  'gitea-double-chevron-left': giteaDoubleChevronLeft,
-  'gitea-double-chevron-right': giteaDoubleChevronRight,
-  'octicon-chevron-left': octiconChevronLeft,
-  'octicon-organization': octiconOrganization,
-  'octicon-tag': octiconTag,
-  'octicon-git-branch': octiconGitBranch,
-  'octicon-rss': octiconRss,
+  'octicon-x-circle-fill': octiconXCircleFill
 };
 
 // TODO: use a more general approach to access SVG icons.