For #103454

This reverts commit 85bedc79.

Adds `workbench.workspaceFirstOpen` workspace setting to control applying a default layout
Removes `firstRun` flag from `IDefaultLayout`
Changes `IDefaultEditor` to require a `uri` rather than path+scheme - still supports a fallback until embedders can migrate
Adds `openOnlyIfExists` property to `IDefaultEditor` for better control on if a file should be opened or not

* Add SyncActionDescriptor.from

There are a whole lot of places in our code where have the following pattern:

```
actionRegistry.registerWorkbenchAction(SyncActionDescriptor.create(CreateNewLocalTerminalAction, CreateNewLocalTerminalAction.ID, CreateNewLocalTerminalAction.LABEL));
```

Notice how the class name has to be repeated  three times.

This change introduces a helper function `SyncActionDescriptor.from` that lets you instead just pass in the class:

```js
actionRegistry.registerWorkbenchAction(SyncActionDescriptor.create(CreateNewLocalTerminalAction));
```

* Avoid cast

fixes #93087

**Why:**
For whatever reason this particular grammar offense was really driving
me batty. I try not to be a grammar nazi, hopefully this is a helpful
change for others and not just my sanity :)

**How:**
Move the preposition 'out' to the start of the prepositional phrase,
instead of the end of the phrase.

Resolves #88799

Add override information to inspect

For #81574

See #84669 for details of the problem around strict function types. This change converts `SyncActionDescriptor` to use a static `create` function. This allows us to make the `create` function generic so that it can take the correct types for strictFunctionTypes

For #79144

Currently we duplicate information for the `editor` and `workbench` configuration nodes in a few places. This change extracts some of those to be constants instead

* fix: remove TypeScript from ExtensionSuggestions

* fix: remove TS ExtensionSuggestion completely