~novakane/zig-fcft-example

README: Format
code: Cleanup
Add CONTRIBUTING.md
Improve parseRgba() with bit shiftting
Submodules: Update
README: Update contributing section
Use zgrapheme for grapheme segmentation

REF: <https://sr.ht/~novakane/zgrapheme/>
main: Fix typo in error messages
README: Fix link
Relicense to GPL-3.0-only