Add CI configuration and PCBWay manufacturing files

TeamCity CI (.teamcity/settings.kts):
- Clones/updates Pico SDK automatically
- Builds firmware with cmake + make
- Publishes .uf2 and .elf as artifacts
- VCS trigger on all branches

Manufacturing files (hardware/manufacturing/):
- BOM_PCBWay.csv: LCSC part numbers for assembly
- CPL_PCBWay.csv: Component placement coordinates
- README with order checklist and specifications

Build script (firmware/build.sh):
- Standalone build script for local development
- Auto-detects Pico SDK location

.teamcity/settings.kts

@@ -0,0 +1,98 @@
+import jetbrains.buildServer.configs.kotlin.*
+import jetbrains.buildServer.configs.kotlin.buildSteps.script
+import jetbrains.buildServer.configs.kotlin.triggers.vcs
+import jetbrains.buildServer.configs.kotlin.vcs.GitVcsRoot
+
+version = "2024.12"
+
+project {
+    description = "SN-L00 Eurorack Latency Tester"
+
+    vcsRoot(SN_L00_Repo)
+    buildType(Build)
+}
+
+object SN_L00_Repo : GitVcsRoot({
+    name = "SN-L00"
+    url = "git@git.sub-net.at:submodular/SN-L00.git"
+    branch = "refs/heads/main"
+    branchSpec = "+:refs/heads/*"
+    authMethod = defaultPrivateKey {
+        userName = "git"
+    }
+})
+
+object Build : BuildType({
+    name = "Build Firmware"
+    description = "Build RP2040 firmware using Pico SDK"
+
+    artifactRules = """
+        firmware/build/sn_l00.uf2 => firmware/
+        firmware/build/sn_l00.elf => firmware/
+    """.trimIndent()
+
+    vcs {
+        root(SN_L00_Repo)
+    }
+
+    steps {
+        script {
+            name = "Install Pico SDK"
+            scriptContent = """
+                #!/bin/bash
+                set -e
+
+                # Check if SDK exists, if not clone it
+                if [ ! -d "${'$'}HOME/pico-sdk" ]; then
+                    echo "Cloning Pico SDK..."
+                    git clone https://github.com/raspberrypi/pico-sdk.git ${'$'}HOME/pico-sdk
+                    cd ${'$'}HOME/pico-sdk
+                    git submodule update --init
+                else
+                    echo "Updating Pico SDK..."
+                    cd ${'$'}HOME/pico-sdk
+                    git pull
+                    git submodule update --init
+                fi
+
+                echo "Pico SDK ready at ${'$'}HOME/pico-sdk"
+            """.trimIndent()
+        }
+        script {
+            name = "Build Firmware"
+            workingDir = "firmware"
+            scriptContent = """
+                #!/bin/bash
+                set -e
+
+                export PICO_SDK_PATH="${'$'}HOME/pico-sdk"
+
+                # Clean and build
+                rm -rf build
+                mkdir build
+                cd build
+
+                cmake .. -DCMAKE_BUILD_TYPE=Release
+                make -j${'$'}(nproc)
+
+                # Verify output
+                ls -la sn_l00.uf2 sn_l00.elf
+
+                echo ""
+                echo "Build successful!"
+                echo "UF2 size: ${'$'}(stat --printf='%s' sn_l00.uf2) bytes"
+            """.trimIndent()
+        }
+    }
+
+    triggers {
+        vcs {
+            branchFilter = "+:*"
+            enableQueueOptimization = false
+        }
+    }
+
+    requirements {
+        contains("teamcity.agent.name", "tc-agent")
+    }
+})

firmware/build.sh

@@ -0,0 +1,55 @@
+#!/bin/bash
+# SN-L00 Firmware Build Script
+# Used by CI and local development
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+BUILD_DIR="${SCRIPT_DIR}/build"
+
+# Check for Pico SDK
+if [ -z "$PICO_SDK_PATH" ]; then
+    # Try common locations
+    if [ -d "/usr/share/pico-sdk" ]; then
+        export PICO_SDK_PATH="/usr/share/pico-sdk"
+    elif [ -d "$HOME/pico-sdk" ]; then
+        export PICO_SDK_PATH="$HOME/pico-sdk"
+    elif [ -d "/opt/pico-sdk" ]; then
+        export PICO_SDK_PATH="/opt/pico-sdk"
+    else
+        echo "ERROR: PICO_SDK_PATH not set and SDK not found in common locations"
+        echo "Please set PICO_SDK_PATH or install pico-sdk"
+        exit 1
+    fi
+fi
+
+echo "Using Pico SDK: $PICO_SDK_PATH"
+
+# Clean build if requested
+if [ "$1" = "clean" ]; then
+    echo "Cleaning build directory..."
+    rm -rf "$BUILD_DIR"
+fi
+
+# Create build directory
+mkdir -p "$BUILD_DIR"
+cd "$BUILD_DIR"
+
+# Configure
+echo "Configuring..."
+cmake .. -DCMAKE_BUILD_TYPE=Release
+
+# Build
+echo "Building..."
+make -j$(nproc)
+
+# Report results
+if [ -f "sn_l00.uf2" ]; then
+    echo ""
+    echo "Build successful!"
+    echo "Output: $BUILD_DIR/sn_l00.uf2"
+    ls -lh sn_l00.uf2 sn_l00.elf
+else
+    echo "Build failed - no output file"
+    exit 1
+fi