\+ Add `gui.py`. Adding the help message here:
```
Usage: gui.py [OPTIONS] RUN_DIR
View specified layout from run_dir using supported viewers
Options:
--viewer [klayout|openroad] Viewer option [default: openroad]
-f, --format [def|odb|gds] Layout format to view [default: odb]
-s, --stage [cts|floorplan|placement|routing|signoff]
Optionally specify which stage to view
--help Show this message and exit.
```
\+ Mount HOME directory when running `make mount`.
\+ Add `-congestion_report_file` to steps that call global routing
