feat: Add package workflow

Part of #2

It build the binary and archive it in workflow artifacts

.github/workflows/package.yml

@@ -0,0 +1,48 @@
+name: Package
+
+on:
+  push:
+    branches:
+      - master
+      - dev-workflow
+  pull_request:
+
+jobs:
+  configure:
+    runs-on: ubuntu-22.04
+    outputs:
+      matrix: ${{ steps.set-matrix.outputs.matrix }}
+    steps:
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 #v4.1.7
+      - name: Set matrix data
+        id: set-matrix
+        run: |
+          echo 'matrix<<EOF' >> "$GITHUB_OUTPUT"
+          echo "$(cat ./tools/ci/build-matrix.json)" >> "$GITHUB_OUTPUT"
+          echo EOF >> "$GITHUB_OUTPUT"
+
+  build:
+    name: "Build [${{ matrix.os }} - ${{ matrix.platform }}]"
+    needs: configure
+    strategy:
+      fail-fast: false
+      matrix: ${{ fromJson(needs.configure.outputs.matrix) }}
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 #v4.1.7
+
+      - name: Install Nix
+        uses: cachix/install-nix-action@ba0dd844c9180cbf77aa72a116d6fbc515d0e87b # v27
+      - name: Build
+        run: |
+          nix-shell --pure --run '${{ github.workspace }}/tools/ci/build.sh ${{ matrix.platform }}'
+          nix-shell --pure --run 'echo "$(bazel info output_path)/filc" > path.txt'
+
+      - name: Get binary path
+        id: path
+        run: echo "path=$(cat path.txt)" >> "$GITHUB_OUTPUT"
+      - name: Archive binary
+        uses: actions/upload-artifact@0b2256b8c012f0828dc542b3febcab082c67f72b # v4.3.4
+        with:
+          name: "filc-${{ matrix.platform }}"
+          path: ${{ steps.path.outputs.path }}

tools/ci/build.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+if [ -z "$1" ]; then
+  platform=""
+else
+  platform="--platforms=//tools/bazel/platform:$1"
+fi
+
+bazel build -c opt $platform //:filc