Desktop: Allow Markdown editor search dialog to be localised

[personalizedrefrigerator]

Summary

This pull request uses the _(...) function to make it possible to localise the strings in the Markdown editor's search dialog (and two of the accessibility strings). See https://codemirror.net/examples/translate/ for details about the approach taken.

Note: This only applies to desktop. On mobile, a custom search dialog is used.

Testing plan

1. Add an exclamation point to each of the mapped strings in localisation.ts:

diff

diff --git a/packages/app-desktop/gui/NoteEditor/NoteBody/CodeMirror/v6/utils/localisation.ts b/packages/app-desktop/gui/NoteEditor/NoteBody/CodeMirror/v6/utils/localisation.ts
index a17cf3571..e5c133df3 100644
--- a/packages/app-desktop/gui/NoteEditor/NoteBody/CodeMirror/v6/utils/localisation.ts
+++ b/packages/app-desktop/gui/NoteEditor/NoteBody/CodeMirror/v6/utils/localisation.ts
@@ -9,20 +9,20 @@ export default () => ({
 	'Selection deleted': _('Selection deleted'),
 
 	// @codemirror/search
-	'Go to line': _('Go to line'),
-	'go': _('go'),
-	'Find': _('Find'),
-	'Replace': _('Replace'),
-	'next': _('next'),
-	'previous': _('previous'),
-	'all': _('all'),
-	'match case': _('match case'),
-	'by word': _('by word'),
-	'replace': _('replace'),
-	'replace all': _('replace all'),
-	'close': _('close'),
-	'current match': _('current match'),
-	'replaced $ matches': _('replaced $ matches'),
-	'replaced match on line $': _('replaced match on line $'),
-	'on line': _('on line'),
+	'Go to line': _('Go to line!!'),
+	'go': _('go!'),
+	'Find': _('Find!'),
+	'Replace': _('Replace!'),
+	'next': _('next!'),
+	'previous': _('previous!'),
+	'all': _('all!'),
+	'match case': _('match case!'),
+	'by word': _('by word!'),
+	'replace': _('replace!'),
+	'replace all': _('replace all!'),
+	'close': _('close!'),
+	'current match': _('current match!'),
+	'replaced $ matches': _('replaced $ matches!'),
+	'replaced match on line $': _('replaced match on line $!'),
+	'on line': _('on line!'),
 });

2. Verify that an exclamation point has been added to each of the strings in the search dialog (except regex):