feat(shell): add poke function and update fish-deps for ov and yay

- Add poke: touch with automatic parent directory creation; prints
  colored notice when new dirs are created; handles multiple file args
- Refactor config.fish CachyOS override block: consolidate copy into
  the erase+source loop alongside ls/lt/cleanup
- fish-deps: replace most with ov (cargo crate + AUR pkg); add yay as
  rec dep with yay-build special (paru -S yay or AUR makepkg); add
  update handling for yay-build in _fish_deps_update
- README: document poke in Directory & File Listing table

README.md

@@ -271,6 +271,7 @@ rm -f file.txt  # Falls through to standard rm -f
 | Function | Description |
 |---|---|
 | `mkcd <dir>` | Create directory (including missing parents) and `cd` into it |
+| `poke <file>...` | `touch` with automatic parent directory creation; prints a colored notice when new directories are created |
 | `ls` | `eza` — long listing, all files, icons, color, hyperlinks |
 | `lss` | `eza` — size-sorted long listing with gradient color scale |
 | `lsr` | `eza` — reversed time-sorted oneline listing |