Part of #78168

Part of #76442

* Adding support for TaskProvider.resolveTask.

* Reorganize task grouping and resolution async code for readability.

* Made small changes and implmented resolveTask for gulp

Fixes #58718

Fixes #69844

Fixes #73412

Add a presentaion option for tasks to automatically show the problems panel.
Fixes #44146

Fixes #71563

This was a mistake. There wasn't a bad merge.
This reverts commit 185e7002.

Fixes #71311

Fixes #70774

* Return splitted instance from ITerminalService::splitInstance

* Add support for terminalGroup to tasks

* Early-exit when the tab could not be split

https://github.com/Microsoft/vscode/pull/65973/files/42e3171a71ae4b6963e47318fd289a66eb48a96a#r245762395

* Use .get()! instead of the unsupported [] to access LinkedMap

* Move api changes into `vscode.proposed.d.ts`

* Rename "terminalGroup" to "group"

* Only keep references to terminals in sameTaskTerminals and idleTaskTerminals if the terminal is not disposed

* Type result variable

Fixes #47265

This reverts commit 85eb3a1f.

Fixes #65472

Part of #63453

Fixes #65263

Fixes #64166

Use `Array<T | U>` when dealing with union types instead of  `(T | U)[]`

Fixes #61592 verification-found

Fixes #4758

Use similar typings to `Object.assign`

Fixes #62789

Fixes #17147

Fixes #25310

Fixes #48835

Fixes #62474

Fixes #30058