implement crowdin (#2033)

.github/workflows/crowdin-download.yaml

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+name: Crowdin download
+
+on:
+  push:
+  workflow_dispatch:
+
+permissions: write-all
+
+jobs:
+  synchronize-with-crowdin:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: crowdin action
+        uses: crowdin/github-action@v1
+        with:
+          upload_sources: false
+          upload_translations: false
+          download_translations: true
+          localization_branch_name: crowdin
+          create_pull_request: true
+          pull_request_title: 'Translations'
+          pull_request_body: 'New Crowdin translations submitted'
+          pull_request_base_branch_name: 'master'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          CROWDIN_PROJECT_ID: ${{ secrets.CROWDIN_PROJECT_ID }}
+          CROWDIN_PERSONAL_TOKEN: ${{ secrets.CROWDIN_PERSONAL_TOKEN }}

.github/workflows/crowdin-upload.yaml

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+name: Crowdin upload
+
+on:
+  push:
+#    paths:
+#      - custom_components/powercalc/translations/*
+    branches: [ master, crowdin_action ]
+
+jobs:
+  synchronize-with-crowdin:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: crowdin action
+        uses: crowdin/github-action@v1
+        with:
+          upload_sources: true
+          upload_translations: true
+          download_translations: false
+        env:
+          GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}
+          CROWDIN_PROJECT_ID: ${{ secrets.CROWDIN_PROJECT_ID }}
+          CROWDIN_PERSONAL_TOKEN: ${{ secrets.CROWDIN_PERSONAL_TOKEN }}

crowdin.yml

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+"project_id_env": "CROWDIN_PROJECT_ID"
+"api_token_env": "CROWDIN_PERSONAL_TOKEN"
+"base_path": "."
+"base_url": "https://api.crowdin.com"
+"preserve_hierarchy": true
+files: [
+  {
+    "source": "/custom_components/powercalc/translations/en.json",
+    "translation": "/custom_components/powercalc/translations/%locale%.json",
+  }
+]