This enables developing code-server in code-server.

This will make it work regardless of what the current URL happens to be.

Also move the telemetry setting into the options since we might as well
make use of it seeing as how we have to parse it for the base path
anyway.

By design the disable-telemetry flag does not affect extension
telemetry, only the setting does, so disabling the setting when the flag
is set should cause extensions to also stop sending telemetry.

Fixes #1116.

Fixes #1351.

This allows external services to distinguish between them.

Closes #997.

Looks like sometimes VS Code throws strings. For example if ifconfig is
missing.

For #1306.

Fixes #1308.

Should make language packs work again.

Reworked from d5740128 to fit in the
new structure.

When using a query parameter without a scheme, the scheme defaults to
`file`. This results in the files in the explorer being technically
different from the file picker files because they are file:// instead of
vscode-remote://, causing the same file to open twice and causing
numerous issues.

Normally the file explorer wouldn't even load at all in this case but we
provide a file service for file:// URLs as a failsafe for certain files
that wouldn't load correctly in the past. These files load fine now
using the vscode-remote scheme, so I'm also removing that service.

Related: #1351.
Fixes #1294.

This is mostly for development where VS Code might not have finished
compiling yet.

This appears to make vscodevim work again.

Doesn't affect Firefox but it does affect other browsers.

Fixes #1136.

Fixes #1104.

It doesn't show in the explorer anymore so there's no point. Also remove
the local scheme transform which is no longer required with the latest
client-side extension implementation.

This should fix all those reports of code-server dropping straight to
Node and things like #1121.

See #1109.

Also too the opportunity to rewrite the build script since there was a
change in the build steps (mainly how the product JSON is inserted) and
to get the build changes out of the patch. It also no longer relies on
external caching (we'll want to do this within CI instead).