feat(tui): support horizontal flips (screen mirror) for rotations

[fiffeek]

What does this PR do?

Adds L keybind to flip the screen on top of rotations. Source:

0 -> normal (no transforms)
1 -> 90 degrees
2 -> 180 degrees
3 -> 270 degrees
4 -> flipped
5 -> flipped + 90 degrees
6 -> flipped + 180 degrees
7 -> flipped + 270 degrees

Why is this change important?

Some users might need to flip their screens when using projectors etc.

How to test this PR locally?

make pre-push

Related issues

Closes #72

[github-actions]

Package	Line Rate	Health
/home/runner/work/hyprdynamicmonitors/hyprdynamicmonitors	100%	✔
github.com/fiffeek/hyprdynamicmonitors/cmd	91%	✔
github.com/fiffeek/hyprdynamicmonitors/internal/app	66%	➖
github.com/fiffeek/hyprdynamicmonitors/internal/config	84%	✔
github.com/fiffeek/hyprdynamicmonitors/internal/dial	47%	❌
github.com/fiffeek/hyprdynamicmonitors/internal/filewatcher	68%	➖
github.com/fiffeek/hyprdynamicmonitors/internal/generators	84%	✔
github.com/fiffeek/hyprdynamicmonitors/internal/hypr	78%	✔
github.com/fiffeek/hyprdynamicmonitors/internal/matchers	99%	✔
github.com/fiffeek/hyprdynamicmonitors/internal/notifications	56%	➖
github.com/fiffeek/hyprdynamicmonitors/internal/power	80%	✔
github.com/fiffeek/hyprdynamicmonitors/internal/profilemaker	68%	➖
github.com/fiffeek/hyprdynamicmonitors/internal/reloader	85%	✔
github.com/fiffeek/hyprdynamicmonitors/internal/signal	68%	➖
github.com/fiffeek/hyprdynamicmonitors/internal/tui	90%	✔
github.com/fiffeek/hyprdynamicmonitors/internal/userconfigupdater	81%	✔
github.com/fiffeek/hyprdynamicmonitors/internal/utils	69%	➖
Summary	84% (5782 / 6863)	✔