Bump CKEditor to 48.0

[oliverguenther]

• Upgraded CKEditor 44.3.x to 48.0.0
• migrated away from removed/deprecated CKEditor internal references
• added generated artifacts for OpenProject compatibility (translations/*.js + ckeditor.css) since that is no longer provided in the build itself

Core PR: opf/openproject#22837
Ticket: https://community.openproject.org/projects/openproject/work_packages/74158/activity

[myabc]

@oliverguenther code changes look ok on cursory glance. I haven't tried building locally yet however. I'd feel a bit more confident about the changes if we were able to introduce type checking (gradually perhaps? - instead of as #109 does)

[Copilot]

Pull request overview

Updates this OpenProject CKEditor build to CKEditor 5 v48 and adjusts the build/integration approach to match upstream packaging changes (notably translations and CSS assets).

Changes:

• Bump all CKEditor 5 packages from 44.3.x to 48.0.0 and update removed/deprecated internal import paths.
• Remove CKEditorTranslationsPlugin usage from webpack and add post-build scripts to generate translations/*.js and a combined ckeditor.css for OpenProject core consumption.
• Update a handful of plugins/converters to use newer CKEditor engine APIs (e.g., selection/range/dom converter changes).

Reviewed changes

Copilot reviewed 19 out of 22 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
webpack.config.js	Removes CKEditor translation plugin + theme importer config to align with v48 build changes.
package.json	Bumps CKEditor deps to 48.0.0; extends build to generate translations + CSS artifacts.
eslint.config.mjs	Adds ESLint globals/rules for bin/**/*.mjs scripts.
bin/build-ckeditor-translations.mjs	New script to generate translations/*.js into OpenProject core vendor directory.
bin/build-ckeditor-styles.mjs	New script to generate a combined ckeditor.css into OpenProject core vendor directory.
patches/@ckeditor+ckeditor5-mention+48.0.0.patch	Updates patch-package target to v48 dist layout for mention regexp tweak.
src/commonmark/commonmarkdataprocessor.js	Updates engine DOM converter import/usage for v48 (ViewDomConverter).
tests/commonmark/escaping.test.js	Updates view stringify helper import for CKEditor v48.
tests/commonmark/_utils/utils.js	Updates view stringify helper import for CKEditor v48.
src/plugins/op-macro-wp-button/utils.js	Updates widget utils import path to v48 public entry.
src/plugins/op-macro-toc-plugin.js	Updates widget utils import path to v48 public entry.
src/plugins/op-macro-list-plugin.js	Updates dropdown utils import path to v48 public entry.
src/plugins/op-macro-embedded-table/utils.js	Updates widget utils import path to v48 public entry.
src/plugins/op-macro-child-pages/utils.js	Updates widget utils import path to v48 public entry.
src/plugins/op-custom-css-classes-plugin.js	Extends alignment mapping and tweaks alignment class handling for v48 behavior.
src/plugins/op-content-revisions/ui.js	Updates CKEditor imports from ckeditor5/src/* to @ckeditor/* packages.
src/plugins/op-content-revisions/op-content-revisions.js	Updates CKEditor imports from ckeditor5/src/* to @ckeditor/* packages.
src/plugins/op-content-revisions/command.js	Updates CKEditor imports from ckeditor5/src/* to @ckeditor/* packages.
src/plugins/op-attachment-listener-plugin.js	Replaces direct Selection construction with editor.model.createSelection.
src/plugins/code-block/widget.js	Updates widget utils import path to v48 public entry.
src/plugins/code-block/converters.js	Replaces new Range() with writer-based createRange() for v48 compatibility.

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[Copilot]

This fallback hard-codes 'center' even though the default is already defined in alignmentValuesMap. Using config.alignmentValuesMap.default here would avoid divergence if the default ever changes and keeps the logic DRY.

Suggested change

	const alignmentToApply = Object.keys(config.alignmentValuesMap).find(alignmentKey => config.alignmentValuesMap[alignmentKey] === alignmentAlias) || 'center';
	const defaultAlignmentToApply = Object.keys(config.alignmentValuesMap).find(alignmentKey => config.alignmentValuesMap[alignmentKey] === config.alignmentValuesMap.default);
	const alignmentToApply = Object.keys(config.alignmentValuesMap).find(alignmentKey => config.alignmentValuesMap[alignmentKey] === alignmentAlias) || defaultAlignmentToApply;