docs: create a Lingo.dev CLI integration guide for Angular

[meetsundrani]

📝 PR Description

Title

Add Angular Integration Guide for Lingo.dev CLI

Summary

This pull request adds a complete integration guide for using Lingo.dev CLI with Angular.
The guide follows the structure and tone of existing framework guides (e.g., Godot, Laravel, Mintlify) and is formatted for direct publication on the Lingo.dev documentation site.

📘 File Added

docs/frameworks/angular/guide.md

🧩 Key Sections Added

• Frontmatter for metadata:

  ---
  title: "Angular"
  subtitle: "AI translation for Angular with Lingo.dev CLI"
  ---
  

• What is Angular? — brief overview of the framework
• What is Lingo.dev CLI? — short intro to the CLI and its purpose
• About this guide — context and goal of the tutorial
• Prerequisites — required tools and environment setup
• What We'll Build — overview of the demo app with multilingual support
• Step-by-step setup:
  1. Setting up a new Angular project
  2. Adding translation support (via Angular i18n or ngx-translate)
  3. Configuring i18n.json for Lingo.dev
  4. Running npx lingo.dev@latest run for translation generation
  5. Integrating translations in Angular (both XLIFF & JSON examples)
  6. Testing and verifying translations in the browser
• Known Limitations — compatibility and locale notes
• Next Steps — links to Angular and Lingo.dev docs

🌍 Supported Languages

• Source: English (en)
• Targets: Spanish (es), French (fr), German (de)

✅ Testing Notes

• Verified on Angular 15+
• Tested both ngx-translate JSON and XLIFF-based i18n workflows
• Confirmed successful translation generation with:

  npx lingo.dev@latest login
  npx lingo.dev@latest run
  

[davidturnbull]

Hi 👋

Thanks for the submission. Just left one comment for the time being. I've assigned myself to review the PR in more depth and will get to it shortly.

Thanks. 😄

[github-actions[bot]]

Hey @meetsundrani! Just checking in - are you still working on this PR? We noticed there are some comments that may need addressing. If you need more time, no problem! Just let us know. If we don't hear back within a week, we'll close this to keep the repo tidy, but you can always reopen when ready.