Shtab

- :hammer: fix zsh non-`str` choices (48)
- :hammer_and_wrench: misc minor build framework updates (49)

- :hammer: skip hidden (`add_help=False`) subcommands (47)

- :tada: more robust `bash` completion (38 <- 37, 11)
- :hammer: fix potential parser help string casting error (44 <- 41)
- :mag: update tests
- :hammer_and_wrench: misc build framework updates

- :tada: re-add `preamble` support (42)
- :hammer_and_wrench: misc build framework updates (43)

- 🛠️ minor build framework updates (39 <- 40)

- :tada: bash: cleaner file/dir completions (37)
- :hammer_and_wrench: build: update actions (36)