For #120675
This uses a script to add the override keyword to places that need it in the codebase
Note that we can't enable the --noImplicitOverride setting yet since there are still around 200 errors that require further attention
* Improve passing of ArrayBuffers to and from webviews
Fixes#115807
* Serialize and restore typed arrays too
This also makes it so that if you pass the same ArrayBuffer twice in an object, we use a single object on the receiver side too
* Fix spelling
* Require VS Code 1.56+
