Add cli app-dir option

[antonrh]

No description provided.

[codspeed-hq]

Merging this PR will not alter performance

✅ 12 untouched benchmarks

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_{Comparing feature/cli-app-dir-option (385d790) with main (ea9d665)¹}

Footnotes

1. No successful run was found on main (385d790) during the generation of this report, so ea9d665 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩