Prepare release v3.12

[lowlighter]

⚠️ Upgrading to 3.12 is highly advised to fix issues that retro-actively impacts all prior versions of metrics because of external changes (no action needed if you are using a rolling branch like @latest, @main or @master).

In particular, the following issues have been fixed:

• Action was always rebuilt (whether using a fork or not) introducing longer runs and possible unstabilities
• indepth feature from language plugin was entirely broken following release of github/linguist 7.16

📦 New features

• 💬 Discussions plugin ^{✨ new!}
  • Add new Discussions plugin #430
  • Add new section about GitHub discussions stats! It can keep track on how many discussions you started and in which categories, along your comments and answers total count
  • 
• 📓 Repositories plugin ^{✨ new!}
  • Add new Repositories plugin #431
  • Display a list of chosen featured repositories that you are proud of using this new plugin!
  • 
• 🏅 Repository contributors
  • Contributors plugin: Display contributors per contribution category #443
  • Display your repositories contributors per contribution categories!
  • 
• 🏆 Achievements
  • Achievements plugin: add new "Deployer" achievement #434
  • Achievements plugin: Add S rank #435
  • 
• 📘 Repository template
  • Add deployments and environments metrics to repositories #433
  • 
• 🌐 Web instances
  • b4ceb43 Add missing placeholder elements
  • Web instances: Add flags to enable unsafe extra features #438
• 🦑 Miscelleanous
  • 7b162bf Remove misplaced debug logs
  • Replace github-linguist gem with Node port Nixinova/Linguist #436

🧰 Fixes

• Support plugin: fix crash because of outdated selector #428
• Normalize licenses display #429
• Languages plugin no longer works #424
• Performance drop (docker file always rebuilt even on official action) #414
• Base: load all commits rather than only last year #440

💕 Sponsors and contributors

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