Implement when clauses for debugger contributions

Fix #133146

Fix #133553

This makes the terminal element ancestors have the correct dimensions which should
make it easier to use the scrollable element object

Part of #74501

Fixes #78438

Co-authored-by: NDaniel Imms <2193314+Tyriar@users.noreply.github.com>

/cc @sbatten

* add auxiliary bar

* enabled DnD

* part of merge

* rename functions in IViewletService
prep-work for unifying services

* make auxiliarybarservice extends Ipanelservice

* rename functions in IPanelService
prep-work for unifying services

* introduce basic experimental setting

* everything is IPaneCompositeService

* panecompositeservice

* fix tests

* rename to panecompositepartservice

* rename parts class

* remove activitybarservice

* remove unnecessary service files

Fix #127676

bracket pair colorizer improvements

add new decoration provider to the start of the list, https://github.com/microsoft/vscode/issues/133210

* Implements immutable lists that are copied on demand.

Part of https://github.com/microsoft/vscode-remote-release/issues/5613

Revert "remove whitespaceBefore/After from InlayHint, https://github.com/microsoft/vscode/issues/16221"

This reverts commit ee56349b.

manage decoration type ids with its referencing decorations, https://github.com/microsoft/vscode/issues/16221