Delete obsolete imeRecorder and imeTester tools

[Copilot]

These standalone HTML/TypeScript tools relied on AMD/loader.js which is no longer functional in the codebase. They were manual testing utilities that are not part of the automated test suite.

Changes

• Deleted imeRecorder.html and imeRecorder.ts - manual IME event recording tool
• Deleted imeTester.html and imeTester.ts - manual IME behavior testing tool
• Preserved imeRecordedTypes.ts - type definitions still used by automated tests in textAreaInput.test.ts

Related to #285255

Original prompt

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This section details on the original issue you should resolve

<issue_title>Migrate or delete imeRecorder/imeTester</issue_title>
<issue_description>They use AMD/loader.js and don't work anymore.
These tools should either be migrated to ESM (e.g. by using vite) or be deleted.

• src\vs\editor\test\browser\controller\imeRecorder.html
• src\vs\editor\test\browser\controller\imeRecorder.ts
• src\vs\editor\test\browser\controller\imeTester.html
• src\vs\editor\test\browser\controller\imeTester.ts

(For #285255)</issue_description>

<agent_instructions>Please delete these files</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Migrate or delete imeRecorder/imeTester #286716

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[Copilot]

Pull request overview

This PR removes obsolete manual IME testing tools that relied on the now-defunct AMD/loader.js module system. The deleted files were standalone HTML/TypeScript utilities for manual testing and are not part of the automated test suite.

Key changes:

• Removed four obsolete files: imeRecorder.html, imeRecorder.ts, imeTester.html, and imeTester.ts
• Preserved imeRecordedTypes.ts which contains type definitions actively used by automated tests

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
src/vs/editor/test/browser/controller/imeRecorder.ts	Deleted manual IME event recording tool (180 lines) that used AMD modules
src/vs/editor/test/browser/controller/imeRecorder.html	Deleted HTML page for the IME recorder tool that loaded code via AMD/loader.js
src/vs/editor/test/browser/controller/imeTester.ts	Deleted manual IME behavior testing tool (205 lines) that used AMD modules
src/vs/editor/test/browser/controller/imeTester.html	Deleted HTML page for the IME tester tool that loaded code via AMD/loader.js