🚀 Pull Request Template – PSLabel

📌 Description

Enables Bluetooth 5.4 Electronic Shelf Label (ESL) profile, allowing PSLabel to function as an ESL tag.

Changes:

• Bluetooth Configuration (app/prj.conf): Added BLE peripheral role, Extended Advertising, Periodic Advertising Sync, and ESL profile enablement
• Module Integration (west.yml): Added nrf-esl-bluetooth v2.5.1-stable from NordicPlayground for ESL service implementation
• Documentation (README.md): Added ESL Profile to tech stack

This provides standardized ESL capabilities: efficient one-to-many communication via PAwR, compatibility with ESL access points, and retail/logistics use case support.

🧩 Type of Change

• 🐛 Bug fix
• ✨ New feature
• 📝 Documentation update
• ♻️ Refactor
• ✅ Test improvement
• 🚨 Security fix
• 🧰 Maintenance / Cleanup

🧪 Test Plan

• Not tested (configuration-only changes, build verification pending CI)

Configuration follows Nordic's official ESL peripheral sample patterns for nRF54L15DK. CI build will validate Kconfig and west manifest correctness.

📎 Related Issues

N/A

📋 Checklist

• I've read the CONTRIBUTING.md
• I've tested the code and it works on hardware/simulator
• I've added or updated documentation where necessary
• I've assigned appropriate labels and reviewers
• My code follows the project's coding style

Thank you for contributing to PSLabel! 🎉

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.