This will allow cliArgs to be only the actual arguments the user passed
which will be used for some logic around opening in existing instances.

- Immediately create ipcMain so it doesn't have to be a function which I
  think feels cleaner.
  - Move exit handling to a separate function to compensate (otherwise
    the VS Code CLI for example won't be able to exit on its own).
- New isChild prop that is clearer than checking for parentPid (IMO).
- Skip all the checks that aren't necessary for the child process (like
  --help, --version, etc).
  - Since we check if we're the child in entry go ahead and move the
    wrap code into entry as well since that's basically what it does.
- Use a single catch at the end of the entry.
- Split out the VS Code CLI and existing instance code into separate
  functions.

Feels more appropriate there to me.

Updates #1729

To fully close that issue see the various TODOs.

Closes #1961

cloud: Rename --coder-bind to --link

See https://stackoverflow.com/a/34881585/4283659

Closes #1538

Integrate Coder Cloud Agent

Closes #1961

🤦

No purpose when all the args are in the args parameter.

We only need configArgs for bindAddrFromAllSources.

See https://github.com/nhooyr/code-server/pull/1/files#r485847134

We only want to use an old version for glibc which the centos:7
image takes care of.

The old version of git used in debian:8 was causing problems
with the uid/gid passthrough with no user in passwd.