feat: tajweed colours, transliteration, and word-level audio highligh…

[walebant]

…ting

• Add TajweedColor enum with quran.com colour palette (17 rules)
• Add WordAnnotation model carrying tajweed colour + transliteration per word
• Add WordAnnotationService fetching tajweed HTML from Quran.com API and transliteration from the local words SQLite database
• Add WordTimingService fetching per-word audio segments from QuranCDN API
• Add WordTimingScheduler that fires highlight callbacks timed to each word
• Extend ImageDecorations with tajweedColors and transliterations dictionaries
• Add tajweedOverlay and transliterationOverlay views in ImageDecorationsView
• Wire WordAnnotationService into ContentImageViewModel/ContentImageBuilder
• Add playingWord callback to QuranAudioPlayerActions
• Wire WordTimingScheduler into QuranAudioPlayer to drive word highlighting
• Add highlightReadingWord to AudioBannerListener / ContentViewModel / QuranInteractor so the audio word highlight flows to the UI
• Register WordAnnotationService as a new Domain SPM target

[mohamede1945]

Thanks for opening the PR.

It would be helpful to include a summary of the testing performed along with screenshots or screen recordings demonstrating the changes. That makes it much easier to evaluate the impact and completeness of the work.

Re: word-level highlighting
We do not use api.qurancdn.com in our stack, and the data format likely to be incompatible with our current implementation.

Re: tajweed rendering
We also do not use api.quran.com for tajweed. Our rendering pipeline is structured differently, particularly with mobile constraints and offline support in mind.