Lots of additions:

- added unit tests
- renamed to yadu
- added gh test actions
- added docs

.github/workflows/ci.yaml

@@ -0,0 +1,47 @@
+name: build-and-test
+on: [push, pull_request]
+jobs:
+  build:
+    strategy:
+      matrix:
+        version: [1.21]
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    name: Build
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Set up Go
+      uses: actions/setup-go@v3
+      with:
+        go-version: ${{ matrix.version }}
+      id: go
+
+    - name: checkout
+      uses: actions/checkout@v3
+
+    - name: build
+      run: go build
+
+    - name: test
+      run: make test
+
+    - name: Update coverage report
+      uses: ncruces/go-coverage-report@main
+      with:
+        report: true
+        chart: true
+        amend: true
+      if: |
+        matrix.os == 'ubuntu-latest' &&
+        github.event_name == 'push'  
+      continue-on-error: true
+  
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-go@v3
+        with:
+          go-version: 1.21
+      - uses: actions/checkout@v3
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v3