chore: Aggressive ruff fixes

[tony]

ruff check --select ALL . --fix --unsafe-fixes --preview --show-fixes --ignore T201 --ignore F401 --ignore PT014 --ignore RUF100 --ignore PGH004; ruff format .

Fixed 8 errors:

• docs/_ext/aafig.py: 2 × COM812 (missing-trailing-comma)
• src/tmuxp/cli/load.py: 1 × PLR5501 (collapsible-else-if)
• src/tmuxp/plugin.py: 3 × FURB110 (if-exp-instead-of-or-operator)
• src/tmuxp/workspace/builder.py: 2 × COM812 (missing-trailing-comma)

Found 1243 errors (8 fixed, 1235 remaining).

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 70.19%. Comparing base (4b5518f) to head (85b982d).

:exclamation: Current head 85b982d differs from pull request most recent head b0281c0. Consider uploading reports for the commit b0281c0 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #928 +/- ## ======================================= Coverage 70.19% 70.19% ======================================= Files 26 26 Lines 1936 1936 Branches 404 404 ======================================= Hits 1359 1359 Misses 454 454 Partials 123 123 ```

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