Create all-new CI workflows

.github/workflows/build-debug.yaml

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+# This workflow builds debug binaries and uploads them for every push to main
+name: build-debug
+
+on:
+  push:
+    branches:
+      - 'main'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/setup-java@v3
+        with:
+          distribution: 'adopt'
+          java-version: 11
+          cache: 'gradle'
+
+      - name: Assemble Debug
+        run: ./gradlew assembleDebug
+
+      - name: Upload APK
+        uses: actions/upload-artifact@v3
+        with:
+          name: apk
+          path: app/build/outputs/apk/debug/**.apk

.github/workflows/create-release.yaml

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+# This workflow creates a release and uploads release binaries for each new tag created
+name: create-release
+
+on:
+  push:
+    tags:
+      - v*
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/setup-java@v3
+        with:
+          distribution: 'adopt'
+          java-version: 11
+          cache: 'gradle'
+
+      - name: Build App
+        run: ./gradlew assembleRelease
+
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        with:
+          generate_release_notes: true
+          files: |
+            app/build/outputs/apk/release/**.apk

.github/workflows/notify-build-debug-complete.yaml

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+# This workflow notifies Discord when `build-debug` succeeds
+name: notify-build-debug-complete
+
+on:
+  workflow_run:
+    workflows: [build-debug]
+    types: [completed]
+
+jobs:
+  on-complete:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Notify workflow completed
+        uses: sarisia/actions-status-discord@v1
+        with:
+          webhook: ${{ secrets.CI_BUILDS_WEBHOOK }}

.github/workflows/notify-release-created.yaml

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+# This workflow notifies Discord when a release is created
+name: notify-build-debug-complete
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  on-complete:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Notify workflow completed
+        uses: sarisia/actions-status-discord@v1
+        with:
+          webhook: ${{ secrets.RELEASES_WEBHOOK }}

.github/workflows/pull-request-checks.yaml

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+# This workflow runs checks against pull requests to ensure it builds and meets code quality standards
+name: pull-request-checks
+
+on:
+  pull_request:
+    branches:
+      - 'main'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/setup-java@v3
+        with:
+          distribution: 'adopt'
+          java-version: 11
+          cache: 'gradle'
+
+      - name: Assemble Debug
+        run: ./gradlew assembleDebug
+
+      - name: Upload APK
+        uses: actions/upload-artifact@v3
+        with:
+          name: apk
+          path: app/build/outputs/apk/debug/**.apk