Replace Ace with Monaco editor

.github/jobs/data/codespellignorefiles.txt

@@ -12,7 +12,7 @@
 ./.github/jobs/uploadcodecov.sh
 ./webapp/vendor
 ./webapp/public/bundles
-./webapp/public/js/ace
+./webapp/public/js/monaco
 ./webapp/templates/bundles
 ./webapp/var/cache
 ./webapp/migrations/Version20230122090005.php

.github/workflows/codeql-analysis.yml

@@ -68,7 +68,7 @@ jobs:
 
     - name: Remove upstream code
       run: |
-        rm -rf webapp/public/js/ace doc/manual/_static
+        rm -rf webapp/public/js/monaco doc/manual/_static
 
     - name: Chown everything to the current runner user
       if: ${{ contains(env.COMPILED, matrix.language) }}

ChangeLog

@@ -4,6 +4,7 @@ Version 8.4.0DEV
 ---------------------------
  - Get rid of 'internal' data source mode, always requiring - but auto
    generating - external ID's for all entities to simplify event logic.
+ - Replace ACE editor with Monaco editor and also use it for diffs.
 
 Version 8.3.0 - 31 May 2024
 ---------------------------

README.md

@@ -63,7 +63,7 @@ DOMjudge manual.
 
 The following JavaScript libraries/snippets are included:
 - coloris: Momo Bassit, licensed under the MIT license, see COPYING.MIT.
-- Ace editor: licensed under the BSD licence, see COPYING.BSD.
+- Monaco editor: licensed under the MIT license, see COPYING.MIT.
 
 The default validator from the Kattis problemtools package is
 included, licensed under the MIT licence, see COPYING.MIT.