Set up Expo OTA updates and CI workflows

.eas/workflows/build-android.yml

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+name: Build Android APK
+
+on:
+  workflow_dispatch:
+    inputs:
+      profile:
+        type: choice
+        description: EAS build profile to use.
+        default: production
+        options:
+          - preview
+          - production
+
+jobs:
+  build_android:
+    name: Build Android APK
+    type: build
+    environment: ${{ inputs.profile }}
+    params:
+      platform: android
+      profile: ${{ inputs.profile }}
+      message: Android ${{ inputs.profile }} APK from ${{ github.ref_name }}

.eas/workflows/publish-updates.yml

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+name: Publish OTA updates
+
+on:
+  push:
+    branches: ['main']
+    paths:
+      - 'app/**'
+      - 'components/**'
+      - 'hooks/**'
+      - 'lib/**'
+      - 'types/**'
+      - 'assets/**'
+      - 'App.tsx'
+      - 'index.ts'
+      - 'global.css'
+      - 'tailwind.config.js'
+      - 'babel.config.js'
+      - 'metro.config.js'
+  workflow_dispatch:
+    inputs:
+      channel:
+        type: choice
+        description: Update channel to publish.
+        default: production
+        options:
+          - preview
+          - production
+      environment:
+        type: choice
+        description: EAS environment to use for the update job.
+        default: production
+        options:
+          - preview
+          - production
+      message:
+        description: Optional update message override.
+        required: false
+
+jobs:
+  publish_main:
+    if: ${{ github.event_name == 'push' }}
+    name: Publish production update
+    type: update
+    environment: production
+    params:
+      channel: production
+      platform: all
+
+  publish_manual:
+    if: ${{ github.event_name == 'workflow_dispatch' }}
+    name: Publish selected update
+    type: update
+    environment: ${{ inputs.environment }}
+    params:
+      channel: ${{ inputs.channel }}
+      message: ${{ inputs.message }}
+      platform: all