Add ttfx: terminal text effects as a single static binary

Rust port of terminaltexteffects that renders byte-identical frames to
the Python original, as one dependency-free binary.

- ~1 ms startup vs ~107 ms for the Python import alone
- median 9.6x faster rendering; heavy effects hold 120fps fullscreen
  where Python drops to ~71fps
- CLI-compatible with tte: same option names, defaults, and exit codes

Built and verified locally with makepkg (x86_64): cargo test passes in
check(), package installs the binary plus shell completions.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

pkgbuilds/ttfx/.omarchy/package.json

@@ -0,0 +1,3 @@
+{
+  "source": "local"
+}