freebsd: add initial support for running on FreeBSD, excluding Bluez,

ppd, and some things. Add a simple wpa_supplicant backend

.github/workflows/go-ci.yml

@@ -58,3 +58,31 @@ jobs:
 
       - name: Build dankinstall
         run: go build -v ./cmd/dankinstall
+
+  build-freebsd:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: core
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+        with:
+          submodules: recursive
+
+      - name: Set up Go
+        uses: actions/setup-go@v6
+        with:
+          go-version-file: ./core/go.mod
+
+      - name: Build all packages
+        env:
+          GOOS: freebsd
+          CGO_ENABLED: 0
+        run: go build -v ./...
+
+      - name: Build dms (distropkg, embedded shell)
+        run: |
+          make sync-shell
+          GOOS=freebsd CGO_ENABLED=0 go build -v -tags 'distro_binary withshell' ./cmd/dms