docs: migrate README.md / README.ru.md to a single NRG template

.github/workflows/nrg.yml

@@ -0,0 +1,45 @@
+name: Regenerate READMEs
+on:
+  push:
+    branches: [v7]
+    paths:
+      - 'README.src.md'
+      - '.github/workflows/nrg.yml'
+  pull_request:
+    paths:
+      - 'README.md'
+      - 'README.ru.md'
+      - 'README.src.md'
+permissions:
+  contents: write
+jobs:
+  regenerate:
+    if: github.event_name == 'push'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+      - uses: nanolaba/nrg-action@v1
+        with:
+          file: README.src.md
+          nrg-version: '1.2'
+      - name: Commit regenerated READMEs
+        run: |
+          if [ -n "$(git status --porcelain README.md README.ru.md)" ]; then
+            git config user.name "github-actions[bot]"
+            git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+            git add README.md README.ru.md
+            git commit -m "docs: regenerate READMEs from README.src.md"
+            git push
+          fi
+  drift-check:
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: nanolaba/nrg-action@v1
+        with:
+          file: README.src.md
+          mode: check
+          nrg-version: '1.2'

README.md

@@ -1,3 +1,5 @@
+<!-- This file was automatically generated by Nanolaba Readme Generator (NRG) 1.1 -->
+<!-- Visit https://github.com/nanolaba/readme-generator for details -->
 # BEM Components Library
 
 `bem-components` is an open-source library that provides a set of ready-made visual components ([blocks](https://en.bem.info/methodology/key-concepts/#block)) for creating web interfaces.

README.ru.md

@@ -1,3 +1,5 @@
+<!-- This file was automatically generated by Nanolaba Readme Generator (NRG) 1.1 -->
+<!-- Visit https://github.com/nanolaba/readme-generator for details -->
 # Библиотека BEM Components
 
 `bem-components` — это библиотека с открытым кодом, которая предоставляет набор готовых визуальных компонентов ([блоков](https://ru.bem.info/methodology/key-concepts/#Блок)). Содержит контролы форм и другие базовые компоненты для построения интерфейсов.