Setup circleci and gh workflow

.circleci/config.yml

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+version: 2.1
+
+orbs:
+  elixir-orb: fresha/[email protected]
+
+workflows:
+  version: 2
+  ci:
+    jobs:
+      - elixir-orb/test:
+          context: Hex
+      - elixir-orb/static-check:
+          dialyzer: true
+          context: Hex
+      - hold-for-dev-publish:
+          type: approval
+          requires:
+            - elixir-orb/test
+            - elixir-orb/static-check
+          filters:
+            branches:
+              ignore:
+                - master
+      - elixir-orb/dev-publish:
+          context: Hex
+          requires:
+            - hold-for-dev-publish
+      - elixir-orb/deploy:
+          context: Hex
+          requires:
+            - elixir-orb/test
+            - elixir-orb/static-check
+          filters:
+            branches:
+              only:
+                - master

.github/workflows/ci.yml

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+name: Build & Publish
+
+on:
+  pull_request:
+  push:
+    branches:
+      - "*"
+
+# by default, permissions are read-only, read + write is required for git pushes
+permissions:
+  contents: write
+
+env:
+  MIX_ENV: test
+
+jobs:
+  test:
+    runs-on: "ubuntu-latest"
+
+    name: Test Elixir ${{ matrix.elixir }}, OTP ${{ matrix.otp }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: ["ubuntu-latest"]
+        elixir: ["1.15", "1.16"]
+        otp: ["26", "25"]
+        include:
+          - elixir: "1.16"
+            otp: "25"
+            lint: lint
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - uses: erlef/setup-beam@v1
+        with:
+          otp-version: ${{matrix.otp}}
+          elixir-version: ${{matrix.elixir}}
+
+      - name: Restore Dependency Cache
+        uses: actions/cache@v3
+        id: cache-deps
+        with:
+          path: |
+            deps
+            _build
+          key: |
+            mix-${{ runner.os }}-${{matrix.elixir}}-${{matrix.otp}}-${{ hashFiles('**/mix.lock') }}
+          restore-keys: |
+            mix-${{ runner.os }}-${{matrix.elixir}}-${{matrix.otp}}-
+
+      - run: mix deps.get
+        if: steps.cache-deps.outputs.cache-hit != 'true'
+      - run: mix deps.compile --warnings-as-errors
+        if: steps.cache-deps.outputs.cache-hit != 'true'
+
+      - name: Check for unused deps
+        run: mix deps.unlock --check-unused
+        if: ${{matrix.lint}}
+
+      - run: mix format --check-formatted
+        if: ${{matrix.lint}}
+
+      - run: mix test
+
+      - name: Build & Publish
+        run: |
+          mix hex.build
+          mix hex.publish --yes
+        if: ${{matrix.lint}}
+        env:
+          MIX_ENV: dev
+          HEX_API_KEY: ${{ secrets.HEX_ORGANIZATION_WRITE_KEY }}