Migrate CI from CircleCI to GitHub Actions

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches: ["**"]
+  workflow_dispatch:
+
+jobs:
+  build_test:
+    uses: membraneframework/membrane_actions/.github/workflows/build-test.yml@main
+    with:
+      submodules: recursive
+
+  test:
+    uses: membraneframework/membrane_actions/.github/workflows/test.yml@main
+    with:
+      submodules: recursive
+      test-flags: "--include long_running"
+      shards: 4
+
+  lint:
+    uses: membraneframework/membrane_actions/.github/workflows/lint.yml@main
+    with:
+      submodules: recursive

.github/workflows/performance.yml

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+name: Performance Test
+
+# Replaces the CircleCI manual approval gate. Trigger this workflow
+# manually from the Actions tab on the branch you want to benchmark.
+on:
+  workflow_dispatch:
+
+jobs:
+  performance:
+    runs-on: performance
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Back up benchmark and mix.exs
+        run: |
+          cp -r benchmark/ $HOME/benchmark_backup/
+          cp mix.exs $HOME/benchmark_backup/
+
+      - name: Pull Docker image
+        run: docker pull membraneframeworklabs/docker_membrane
+
+      - name: Run benchmarks on feature branch
+        run: |
+          mkdir -p $HOME/results
+          docker run \
+            -e MIX_ENV=benchmark \
+            -v $PWD:/root/app \
+            -v $HOME/results:/root/results \
+            -w /root/app \
+            membraneframeworklabs/docker_membrane \
+            mix do deps.get, deps.compile --force --all, compile --force, run benchmark/run.exs /root/results/feature_branch_results
+
+      - name: Switch to master and restore benchmark
+        run: |
+          git checkout -f master
+          cp $HOME/benchmark_backup/mix.exs .
+
+      - name: Run benchmarks on master
+        run: |
+          docker run \
+            -e MIX_ENV=benchmark \
+            -v $PWD:/root/app \
+            -v $HOME/results:/root/results \
+            -v $HOME/benchmark_backup/benchmark:/root/app/benchmark \
+            -w /root/app \
+            membraneframeworklabs/docker_membrane \
+            mix do deps.get, deps.compile --force --all, compile --force, run benchmark/run.exs /root/results/master_results
+
+      - name: Compare results
+        run: |
+          docker run \
+            -e MIX_ENV=benchmark \
+            -v $PWD:/root/app \
+            -v $HOME/results:/root/results \
+            -v $HOME/benchmark_backup/benchmark:/root/app/benchmark \
+            -w /root/app \
+            membraneframeworklabs/docker_membrane \
+            mix run benchmark/compare.exs /root/results/feature_branch_results /root/results/master_results
+
+      - name: Clean up results
+        if: always()
+        run: rm -f $HOME/results/*

.github/workflows/release.yml

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+name: Release
+
+on:
+  push:
+    tags:
+      - "v*"
+  workflow_dispatch:
+
+jobs:
+  build_test:
+    uses: membraneframework/membrane_actions/.github/workflows/build-test.yml@main
+    with:
+      submodules: recursive
+
+  test:
+    uses: membraneframework/membrane_actions/.github/workflows/test.yml@test-sharding
+    with:
+      submodules: recursive
+      test-flags: "--include long_running"
+      shards: 4
+
+  lint:
+    uses: membraneframework/membrane_actions/.github/workflows/lint.yml@main
+    with:
+      submodules: recursive
+
+  hex_publish:
+    needs: [build_test, test, lint]
+    uses: membraneframework/membrane_actions/.github/workflows/hex-publish.yml@main
+    with:
+      submodules: recursive
+    secrets:
+      HEX_API_KEY: ${{ secrets.HEX_API_KEY }}
+
+  gh_release:
+    needs: [hex_publish]
+    uses: membraneframework/membrane-actions/.github/workflows/github-release.yml@main