xterm@3.15.0-beta87 

Diff: https://github.com/xtermjs/xterm.js/compare/e99de7a...52c562d

Changes:

- Fix edge cases in inputhandler methods
- A lot of layering changes
- Dependency security updates
- test script for mouse modes
- Improve logging system
- Announce input and backspace on VoiceOver
- Fix test exit code

Fixes #42559
Fixes #56468

Add CustomExecution2 test and make start fire after onDidOpenTerminal

Fix for "whiteSpace" typo: Parameter name and word is one command word spelled "whitespace".

This reverts commit c467419e.

Rebase

[XML] Use the same HTML language configuration for XML

onDidExecuteCommand API

Wait until data is flushed in cli

chore(build): Add generated warning to monaco.d.ts

avoid extensionTestsLocationURI.fsPath as it normalizes path (for #69…

Part of #70978

Fix start cb in CustomExecution2