[web] add BibTeX visual editor module (#30726)

* [web] add BibTeX visual editor module

* Make the visual editor hook open to extension

Instead of looking specifically for the bibtex visual editor, allow any
extension to provide a visual editor.

* Fix stylelint error

---------

Co-authored-by: Eric Mc Sween <5454374+emcsween@users.noreply.github.com>
GitOrigin-RevId: c85c27a2b119c826e3d00cbd475a2a21f1508091

services/web/frontend/js/features/source-editor/utils/visual-editor.ts

@@ -0,0 +1,29 @@
+import importOverleafModules from '../../../../macros/import-overleaf-module.macro'
+import { isValidTeXFile } from '../../../main/is-valid-tex-file'
+
+const visualEditorProviders = importOverleafModules('visualEditorProviders')
+
+export function isVisualEditorAvailable(filename: string): boolean {
+  // Core LaTeX visual editor
+  if (isValidTeXFile(filename)) {
+    return true
+  }
+
+  // Visual editors provided by modules
+  for (const provider of visualEditorProviders) {
+    if (provider.import.isVisualEditorAvailable(filename)) {
+      return true
+    }
+  }
+  return false
+}
+
+export function getVisualEditorComponent(filename: string) {
+  for (const provider of visualEditorProviders) {
+    const component = provider.import.getVisualEditorComponent(filename)
+    if (component != null) {
+      return component
+    }
+  }
+  return null
+}