Because I dont have the default browser set up correctnly on any of my
machiens

And some logging as I figure out how to use it

Use webpack's CopyPlugin transform pattern to do this manually. This is
probably a bad idea! It's just for prototyping purposes.

Nonetheless required for it to work!

Another typo. Guess my local test wasn't running the contents really

Also:
- tsserver.js is no longer minified
- log crossOriginIsolated

Because it's browser-specific

Build only the ts parts of tsserver.web.js, don't rebuild the vscode
extension. This is a lot faster.

Sheetal showed me the correct way to create a verbose logger instead.

And make isWeb support semantic mode.

Also paste in some example code for cancellation, which is not finished
at all.

It compiles and looks kind of plausible. But I haven't tested it yet.

Further simplifies the message dispatch code by shifting complexity to
setup. And the setup is straight-line code.

goto-def is currently broken because some part of main vscode still
needs treat the files as in-memory, though.

Like the previous host did, but without the leading ^ that TS hard-codes
as "in-memory".

The tsserver host needs to know about the encoding, but the translation
is in a single function. This also means that displayed file paths are
prefixed with /scheme/authority (/vscode-test-web/mount in my testing), but I think that's fine.

I'm not using it to set the schema/authority for getCurrentDirectory
right now, so there's no shared state to mutate.

Similar to the special-casing in typescriptServiceClient.toResource.
Also requires passing in the extensionUri. This feels like it's breaking
through at least one abstraction layer, which might be a problem.

1. Simplify cancellation checking in web tsserver host to match the
checking in typescript's node host.
2. Move cancellation of request in the extension to tryCancelRequest
from sendNextRequests.
3. Only send cancellation via node or web cancellation, not both.

Also add some TODO comments for the revision to watches.

…sue with retrieving the cancellation bit

Watching the entire filesystem recursively is supposed to be
inefficient.

Not done yet: there is an error when watching directories, but it works.
And I can't tell whether watching files works yet.

Now the syntax server actually runs as a syntax server.

1. Remove a little logging.
2. Correct failure return value for getFileSize
3. Reorder some methods and parameters.

I'm not sure if it's OK to depend on a module from another extension;
it's probably better to include the files from a central place instead.

1. Copy and adapt implementations from node host where possible.
2. Note questions for the PR elsewhere.
3. Remove logging except for caught exceptions.

Also gate it behind a check to `crossOriginIsolated`

It won't minimise it *much*, but I also consolidated some
unnecessarily-spread-out code that will be easier to read in the long
term, and possibly easier to read in diff form as well.

Copy from markdown extension to typescript extension. I used the
existing dependencies in the typescript extension, but verified that
they would work the same.

…y prefix when project wide intellisense is disabled

Symlinks are implicitly supported by the filesystem right now.