Fixes #67144

Fixes #67145

#67940

Fixes #55718

* 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

Part of #62110

`autoFix` is a confusing term since we have a `auto fix` command now. Using `fix all` as this term is used by many linters for this type of operation

Part of #62110

* Adds a new `CodeActionKind`: `source.autoFix`.
* Implements a simple auto fix provider for typescript. This provider can auto fix `implement interface` and `spelling` errors (provided there is only a single valid fix listed)

The provider is likely not something we actually want to check it (especially in its current state), we should ask TS for proper autoFix support

Part of #62110

Use the more generic name as suggested in https://github.com/Dart-Code/Dart-Code/issues/1393. This makes the intent of the field more clear and also allows us to extend the concept of preferred code actions to refactorings and other classes of code actions

Experimentally also allows a `preferred` value for `apply` when configuring code aciton keyboard shortcuts. This applies the preferred code action returned from the list of code actions returned

Part of #62110

- Adds a new field `canAutoApply` to code actions. This field indicates that a code action can be applied without additional user input. For quick fixes, this should be set if the fix properly addresses the error

- Enable auto fixes for TS spelling errors

- Added a `editor.action.autoFix` command to triggers auto fixes at the current cursor position

This reverts commit 7b375fcb.

Reapplies 4a38520d with a fix for #66202

Fixes #66202

This reverts commit 4a38520d.

For #33413

Adds the active `SignatureHelp` object (along with the active signature) to the `SignatureHelpContext`.