Add lockfile and pinned extras (#16421)

* Add `pin`, `pin-curl-cffi`, `pin-secretstorage` and `pin-deno` extras
* Check in a `uv.lock` for devs
* Add `devscripts/update_requirements.py` for dependency upgrades

Authored by: bashonly, Grub4K

Co-authored-by: Simon Sawicki <contact@grub4k.dev>

.gitignore

@@ -92,7 +92,6 @@ updates_key.pem
 *.class
 *.isorted
 *.stackdump
-uv.lock
 
 # Generated
 AUTHORS
@@ -104,7 +103,6 @@ README.txt
 *.tar.gz
 *.zsh
 *.spec
-bundle/requirements/*.in
 test/testdata/sigs/player-*.js
 test/testdata/thumbnails/empty.webp
 test/testdata/thumbnails/foo\ %d\ bar/foo_%d.*