Add VS Code extension for Robot Framework Skills

[manykarim]

Summary

• Complete VS Code extension (robotframework-skills) that complements RobotCode with curated snippets, code generators, keyword reference, migration tools, and test result analysis
• Designed to work alongside RobotCode (309K+ installs), not compete — fills gaps in snippets, scaffolding, offline keyword reference, and migration guidance
• Includes comprehensive implementation plan at docs/vscode-extension-implementation-plan.md

Features

Phase 1: Snippets + Commands

• 46 snippets across 7 libraries (Browser, Selenium, Appium, Requests, RESTinstance, BuiltIn, RF structure)
• 8 commands: search/explain keywords, generate keywords/tests, scaffold projects, analyze results, check environment, modernize syntax
• Python script bridge reusing existing scripts via child_process

Phase 2: Tree Views + Webviews

• Keyword browser tree view with 114 pre-indexed keywords across 6 libraries
• Test results tree view parsing output.xml
• 3 webview panels: results dashboard, keyword documentation, migration report

Phase 3: Code Actions + Providers

• 7 migration code actions ([Return]→RETURN, Run Keyword If→IF/END, etc.)
• Code lenses for Run/Debug tests
• Hover documentation from static keyword index
• Completion provider for keywords and library names
• Deprecated syntax diagnostics (6 patterns)
• Status bar items (RF version, test results)

Phase 4: Testing + CI/CD + Documentation

• 5 test suites (extension, invoker, snippets, providers, keyword index)
• GitHub Actions CI workflow (build matrix, test, snippet validation, VSIX packaging)
• Marketplace README and CHANGELOG

Validation

• TypeScript: 0 compilation errors
• esbuild: 57KB production bundle
• VSIX: 83KB package, 33 files
• Snippets: 46 valid, 46 unique prefixes, all rf- prefixed
• Keyword index: 6 libraries, 114 keywords
• Existing tests: 16 passed, 5 skipped (unchanged)
• Marketplace validation: ALL CHECKS PASSED

Test plan

• Install VSIX locally with code --install-extension robotframework-skills-0.1.0.vsix
• Verify snippets trigger in .robot files (type rf-browser-setup)
• Test Command Palette commands (RF Skills: Search Keywords, etc.)
• Verify keyword browser tree view in sidebar
• Test results dashboard with sample output.xml
• Verify code actions appear on deprecated syntax
• Test code lenses above test cases
• Check status bar items
• Run CI workflow on GitHub Actions

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