ci: add FreeBSD to CI.

.github/workflows/unit-tests-bsd.yml

@@ -21,6 +21,30 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  unit-tests-freebsd:
+      runs-on: ubuntu-22.04
+      timeout-minutes: 20
+      steps:
+        - uses: actions/checkout@v4
+          with:
+            submodules: recursive
+        - name: Compile
+          uses: vmactions/freebsd-vm@v1
+          with:
+            release: '14.0'
+            usesh: true
+            prepare: |
+              pkg install -y rust git
+              cargo install cargo-hack
+              git config --global --add safe.directory /home/runner/work/eza/eza
+            run: |
+              set -e
+              export CARGO_TERM_COLOR="always"
+              export RUSTFLAGS="--deny warnings"
+              cargo fmt --check
+              cargo clippy -- -D warnings
+              cargo hack test
+
   unit-tests-netbsd:
     runs-on: ubuntu-22.04
     timeout-minutes: 20