Non-PHP/JS files audit (grouped)

[somethingwithproof]

Group: Bugs

• Fix mactrack.css line 50: duplicate `color:` in `background-color: color: rgba(250, 253, 158);` → should be `background-color: rgba(250, 253, 158);`
• Fix locales/build_gettext.sh: `cat include/cacti_version` path is wrong for plugin (file does not exist in plugin; script expects Cacti root or needs package-version from INFO)

Group: Stale / outdated

• Update README.md: remove or update MacTrack Wiki link (issue Remove wiki here, documentation was moved to cacti docs. #241 - wiki removed, docs moved to Cacti docs)

Group: Missing

• Add .github/PULL_REQUEST_TEMPLATE.md (gpsmap has it)

Group: Minor

• Review locales/LC_MESSAGES/ka.mo vs ka-GE.mo (possible duplicate/legacy)

Group: Portability

• locales/build_gettext.sh: `sed -i` may fail on macOS (BSD sed); consider `sed -i.bak` or detect OS

Ref: audit of all non-PHP, non-JavaScript files.

Related

• Files to delete or update (grouped) #306 Files to delete or update (grouped)

[somethingwithproof]

Fix PR open: #325