Server in async_main is not reachable because we already checked for
`args["serve"]` in main()

Example:

````shell
(oi_dev) λ interpreter --serve --model gpt-4o-mini --auto-run
Starting OpenAI-compatible server...

============================================================
Open Interpreter API Server
============================================================

To use with an OpenAI-compatible client, configure:
  - API Base:     http://127.0.0.1:8000
  - API Path:     /chat/completions
  - API Key:      (any value, authentication not required)
  - Model name:   (any value, ignored)

NOTE: The server will use the model configured in --model
      Currently using: gpt-4o-mini
============================================================
````

"Don't Repeat Yourself"

CWD in system message does not update as AI changes folders, but the
time does stay up to date.

Put username on its own line and remove from cwd try..except.

https://www.flake8rules.com/rules/E711.html

This reverts commit 65b1f2a, reversing
changes made to 56c5df5.

This reverts commit 56c5df5, reversing
changes made to 9ce2389.

This reverts commit 9ce2389, reversing
changes made to ceb78e0.

This reverts commit ceb78e0.