feat(scenario): export scenarios as standalone playwright e2e test projects

- Added E2eExportService to package scenarios as plug-and-play zip archives
  containing package.json, playwright.config.ts, test.spec.ts, .env, credentials.json,
  snippets, and referenced scenario files
- Only bundles credentials, snippets, and files actually referenced (directly or
  transitively) by the scenario's steps, reducing archive size
- Exported test runs entirely offline using a context shim that mirrors liqa's API
  (page, getCredential, runSnippet, getScenarioFiles, downloadFile, assert, etc.)
- Added GET /scenarios/:id/export-e2e HTTP endpoint and export_e2e_test MCP tool
- Added getUsedSnippets() endpoint to list snippets referenced by a scenario
- Added "Used Snippets" section on scenario detail page
- Added archiver@^7.0.1 dependency for zip archive creation
- Bumped version to 1.11.0

CHANGELOG.md

@@ -2,6 +2,16 @@
 
 All notable changes to this project will be documented in this file.
 
+## 1.11.0 - 2026-09-15
+
+Changes since 1.10.1:
+
+### Added
+
+- Added export of a scenario as a standalone, plug-and-play Playwright e2e test project (zip archive with `package.json`, `playwright.config.ts`, `test.spec.ts`, `README.md`, `.env`, `credentials.json`, `snippets/*.js`, and any attached scenario files) that runs entirely independently of the liqa backend. Available as a "Export e2e test" button on the scenario detail page, `GET /scenarios/:id/export-e2e`, and the `export_e2e_test` MCP tool.
+- The exported test only bundles the credentials, snippets, and attached files actually referenced (directly or transitively) by the scenario's steps.
+- Added a "Used Snippets" section on the scenario detail page listing the snippets referenced by the scenario's steps, linking to each snippet's detail page. Backed by `GET /scenarios/:id/used-snippets`.
+
 ## 1.10.1 - 2026-09-15
 
 Changes since 1.10.0: