Add chart color tokens

Fixes #107309

https://github.com/microsoft/vscode-codicons/commit/8ac9c9d422265aac5ae5f83bf9452baf4455cd8b

For now, we will go back to the native hover. The custom hover should be used at the resource label level instead of the tree level to avoid conflicts with resource labels. This is a larger change that will come later.

Part of #106095

Part of #103120

The rationale is that the file system maybe in-memory and saving a workspace into such a file system will mean that after window reload we have to open an empty workspace because the workspace may not be persisted anymore.

cc @sbatten

Remove .monaco-workbench from default icon foreground

Fix #107219