Partial fix for https://github.com/microsoft/vscode/issues/112750

This reverts commit 11d5c625.

Keep only `@types/*` deps in `/build/` and share `terser`

Fixes #112851

Fixes #102124

This should enable open to side for custom editors and for notebooks

Fixes #111980

We should take the vscode.ViewColumn here, not the internal view column type

* #27498 restore extension editor webview scroll positions

* Delay setInitialScrollPosition so iframe contents  have time to load fully (we hope)

* Some changes requested by @mjbvz

* revert setTimeout hack

* fix my spelling error in comment

* remove blank line to perfect the undo
Co-authored-by: NMatt Bierner <matb@microsoft.com>

Fixes https://github.com/microsoft/vscode/issues/112842

Fixed Issue #110225 - Dragging to select text on Peek window should not hide it

Fixes https://github.com/microsoft/vscode/issues/112078

Move /build/ dev dependencies to root

camelCase/PascalCase to snake_case