Adding workflow files from mass CLI, + codeowners

.github/CODEOWNERS

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+* @chrisghill
+* @mclacore

.github/workflows/lint.yaml

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+# adapted from https://github.com/golangci/golangci-lint-action
+name: golangci-lint
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+permissions:
+  contents: read
+  # Optional: allow read access to pull request. Use with `only-new-issues` option.
+  pull-requests: read
+jobs:
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-go@v5
+        with:
+          go-version: 1.22
+      - uses: actions/checkout@v4
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v3
+        with:
+          # Optional: version of golangci-lint to use in form of v1.2 or v1.2.3 or `latest` to use the latest version
+          version: v1.56.2

.github/workflows/pre-commit.yaml

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+name: pre-commit
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v2
+    - uses: pre-commit/[email protected]
+      env:
+        # this check prevents devs from commit to main.
+        # however, we don't want it to fail on commits to main in CI.
+        # we use the golangci-lint gh action in lint.yaml because it generates useful comments.
+        SKIP: no-commit-to-branch,golangci-lint

.github/workflows/test.yaml

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+name: Test
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: 1.22
+      - name: Build
+        run: go build -v ./...
+      - name: Test
+        run: go test -v ./...