GitHub actions (#167)

* added a github workflow for closing stale issues

* added github PR validation workflows

* fixed the dictionary validator missing digits in words

* fixed the build failing completely when there no git tags

* updated androidx.room 2.4.3 -> 2.5.0

.github/workflows/build.yml

@@ -0,0 +1,19 @@
+name: Build the Project
+
+on: [pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    # setup
+    - name: Checkout project sources
+      uses: actions/checkout@v2
+    - name: Setup Gradle
+      uses: gradle/gradle-build-action@v2
+
+    # validation
+    - name: Validate Dictionaries
+      run: ./gradlew validateDictionaries
+    - name: Build Release APK
+      run: ./gradlew assemble

.github/workflows/close-stale-issues.yml

@@ -0,0 +1,22 @@
+name: Close inactive issues
+on:
+  schedule:
+    - cron: "21 0 * * *"
+
+jobs:
+  close-issues:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: actions/stale@v4
+        with:
+          days-before-issue-stale: 100
+          days-before-issue-close: 100
+          stale-issue-label: "stale"
+          stale-issue-message: "This issue is stale because it has been open for 100 days with no activity."
+          close-issue-message: "This issue was closed because it has been inactive for 100 days since being marked as stale."
+          days-before-pr-stale: -1
+          days-before-pr-close: -1
+          repo-token: ${{ secrets.GITHUB_TOKEN }}