Convert tidier.js to TypeScript and add CodeMirror view typings

[VaibhavNarayann]

Fixes #3815

Summary

This PR converts the existing tidier.js module to TypeScript and adds explicit
typings while preserving the current formatting behavior.

Changes

• Renamed tidier.js → tidier.ts
• Added TypeScript typings for:
  • CodeMirror EditorView
  • Formatter mode (javascript | html | css)
• Updated imports and exports to be TypeScript-compatible
• Added local module declarations for Prettier standalone and parser packages
• Preserved existing formatting logic using formatWithCursor

Verification

Manually verified that Tidy / Format works correctly for:

• JavaScript
• HTML
• CSS

The editor cursor remains stable after formatting and does not jump unexpectedly.

Checklist

I have verified that this pull request:

• No linting errors (npm run lint)
• No test failures (npm run test)
• No TypeScript errors (npm run typecheck)
• Changes are on a dedicated feature branch
• PR references the related issue (Fixes #3815)
• Changes comply with the project’s accessibility guidelines

[release-com]

Release Environments

This Environment is provided by Release, learn more!
To see the status of the Environment click on Environment Status below.

• p5.js-web-editor
  • app-ted5652.release.editor.p5js.org/
  • preview-ted5652.release.editor.p5js.org/

🔧Environment Status : https://app.release.com/public/Processing%20Foundation/env-21672378de

[khanniie]

I'm not exactly sure how, but the diff looks a little bit crazy right now : O I glanced at the PR a week ago and the few changes seemed fine, but now I see a much larger diff, I assume because of some rebasing or pulling from develop? I've had this happen before and couldn't figure out how to fix it other than opening a new branch and cherrypicking my changes over... is there any way to do something similar here?

[Nixxx19]

hey @khanniie, it definitely looks like some extra history got pulled in during a merge or rebase. the best way to solve this and much faster than cherry-picking to a new branch is a soft reset.

@VaibhavNarayann, if you run git reset --soft origin/develop-codemirror-v6, it will keep all your code changes but clear the messy history. then you can just make one fresh commit, and the diff will be perfectly clean. you'll just need to git push --force after that to update the PR.