DO-1082: Split GitHub workflows - separate lint and build processes

[TheOrangePuff]

📝 Summary

Restructured the existing GitHub PR workflow to improve efficiency and parallelization by splitting the single build job into separate install, lint, build, and test jobs.

🚀 Changes Made

• ✨ Split the existing build job into 4 separate jobs:

  • 📦 install: Handles dependency installation and caching
  • 🔍 lint: Runs linting on affected packages (extracted from build job)
  • 🏭 build: Builds affected packages only
  • 🧪 test: Runs tests on affected packages (unchanged behavior)

• 💾 Implemented proper node_modules caching:

  • Install job creates cache of node_modules and .yarn/cache
  • Other jobs restore from cache instead of running yarn install
  • Cache key based on yarn.lock hash for accuracy

• 🎯 Updated build commands to use affected:

  • Changed yarn nx run-many -t build → yarn nx affected:build
  • Ensures only changed packages are built (consistent with lint/test)

• 🔧 Removed built-in yarn cache:

  • Removed cache: "yarn" from actions/setup-node@v4
  • Using explicit actions/cache@v3 for better control

💡 Benefits

• ⚡ Better parallelization: Lint, build, and test now run simultaneously after install
• 🚄 Improved efficiency: Dependencies installed once and shared across all jobs
• 💰 Resource optimization: Eliminates redundant yarn install in each job
• 🎯 Consistent affected logic: All jobs now process only changed packages
• ⏱️ Faster feedback: Jobs can fail independently without blocking others