chore: clean up repo for public release

- Remove BMAD framework, IDE configs, dev screenshots, test files,
  internal docs, and backup files
- Rename keep-notes/ to memento-note/
- Update all references from keep-notes to memento-note
- Add Apache 2.0 license with Commons Clause (non-commercial restriction)
- Add clean .gitignore and .env.docker.example

memento-note/tests/capture-masonry.spec.ts

@@ -0,0 +1,9 @@
+import { test, expect } from '@playwright/test';
+
+test('capture masonry layout', async ({ page }) => {
+  await page.goto('http://localhost:3000');
+  // Attendre que Muuri s'initialise et que le layout se stabilise
+  await page.waitForTimeout(2000);
+  await page.screenshot({ path: '.playwright-mcp/muuri-masonry-layout.png', fullPage: true });
+  console.log('Screenshot saved to .playwright-mcp/muuri-masonry-layout.png');
+});