ci: restore GitHub Actions workflows

Author: bimawa

.github/workflows/ci.yml

@@ -0,0 +1,39 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    name: Build & Check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Rust (ESP32-S3)
+        uses: esp-rs/xtensa-toolchain@v1.6
+        with:
+          default: true
+          version: "1.89.0"
+          buildtargets: esp32s3
+          ldproxy: false
+
+      - name: Enable caching
+        uses: Swatinem/rust-cache@v2
+
+      - name: Check formatting
+        run: cargo fmt -- --check
+        continue-on-error: true
+
+      - name: Build release
+        run: cargo build --release
+
+      - name: Check for warnings
+        run: cargo build --release 2>&1 | grep -E "^warning:" | head -20 || true

.github/workflows/release.yml

@@ -0,0 +1,107 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "v[0-9]+.[0-9]+.[0-9]+"
+      - "v[0-9]+.[0-9]+.[0-9]+-*"
+  workflow_dispatch:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    name: Build Firmware
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Rust (ESP32-S3)
+        uses: esp-rs/xtensa-toolchain@v1.6
+        with:
+          default: true
+          version: "1.89.0"
+          buildtargets: esp32s3
+          ldproxy: false
+
+      - name: Install cargo-espflash
+        run: |
+          wget -q 'https://github.com/esp-rs/espflash/releases/download/v4.0.1/cargo-espflash-x86_64-unknown-linux-musl.zip'
+          unzip -q cargo-espflash-x86_64-unknown-linux-musl.zip
+          mv cargo-espflash ~/.cargo/bin/
+          chmod +x ~/.cargo/bin/cargo-espflash
+
+      - name: Enable caching
+        uses: Swatinem/rust-cache@v2
+
+      - name: Build release binary
+        run: |
+          cargo espflash save-image --chip esp32s3 --release rfid-reader.bin
+
+      - name: Build merged binary (ready to flash)
+        run: |
+          cargo espflash save-image --merge --chip esp32s3 --flash-size 16mb --release rfid-reader-full.bin
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: firmware
+          path: |
+            rfid-reader.bin
+            rfid-reader-full.bin
+
+      - name: Create Release
+        if: startsWith(github.ref, 'refs/tags/')
+        uses: softprops/action-gh-release@v1
+        with:
+          files: |
+            rfid-reader.bin
+            rfid-reader-full.bin
+          body: |
+            ## ST25TB RFID Reader Firmware
+            
+            ### Files
+            - `rfid-reader.bin` - Application binary only
+            - `rfid-reader-full.bin` - Full merged binary (includes bootloader, ready to flash at 0x0)
+            
+            ### Flashing
+            ```bash
+            # Using espflash (recommended)
+            espflash flash --port /dev/ttyUSB0 rfid-reader-full.bin
+            
+            # Or using esptool.py
+            esptool.py --chip esp32s3 --port /dev/ttyUSB0 write_flash 0x0 rfid-reader-full.bin
+            ```
+          draft: false
+          prerelease: false
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  ci:
+    name: CI Check
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' && !startsWith(github.ref, 'refs/tags/')
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Rust (ESP32-S3)
+        uses: esp-rs/xtensa-toolchain@v1.6
+        with:
+          default: true
+          version: "1.89.0"
+          buildtargets: esp32s3
+          ldproxy: false
+
+      - name: Enable caching
+        uses: Swatinem/rust-cache@v2
+
+      - name: Check
+        run: cargo check --release
+
+      - name: Build
+        run: cargo build --release