Move source editor out of module (#12457)

* Update Copybara options in preparation for open-sourcing the source editor

* Move files

* Update paths

* Remove source-editor module and checks for its existence

* Explicitly mention CM6 license in files that contain code adapted from CM6

GitOrigin-RevId: 89b7cc2b409db01ad103198ccbd1b126ab56349b

services/web/frontend/js/features/source-editor/extensions/bundle.ts

@@ -0,0 +1,30 @@
+import { syntaxTree } from '@codemirror/language'
+import { EditorSelection, StateEffect, StateField } from '@codemirror/state'
+import {
+  Decoration,
+  EditorView,
+  hoverTooltip,
+  keymap,
+  ViewPlugin,
+  WidgetType,
+} from '@codemirror/view'
+import { CodeMirror, Vim, getCM } from '@replit/codemirror-vim'
+
+export default {
+  Decoration,
+  EditorSelection,
+  EditorView,
+  StateEffect,
+  StateField,
+  ViewPlugin,
+  WidgetType,
+  hoverTooltip,
+  keymap,
+  syntaxTree,
+}
+
+export const CodeMirrorVim = {
+  CodeMirror,
+  Vim,
+  getCM,
+}