chore: import local project into Gitea

.gitignore

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+# OS / tooling
+.DS_Store
+Thumbs.db
+
+# Editors
+.cursor/
+
+# Secrets
+.env
+.env.*
+!.env.example
+!.env.template
+
+# Python
+__pycache__/
+*.py[cod]
+.venv/
+venv/
+
+# Node / frontend
+node_modules/
+dist/
+
+# Typical embedded / tooling noise
+*.log
+
+# Builds (adjust per subtree if needed)
+**/build/.ninja_deps
+**/build/.ninja_log
+

README.md

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+# s3nfc
+
+Wraps **`s3NFC/`** (contains its own **`README.md`**, **`platformio.ini`**, **`src/`**, **`data/`**).
+
+Navigate into **`s3NFC`** and follow PlatformIO build/upload instructions for the PN532 pairing / NFC workflow you authored.