Add agent-native TestGen adoption features

[princepal9120]

Summary

• Add real testgen doctor for repo readiness checks, framework detection, provider key status, test folder discovery, native test command suggestions, and safe first command output
• Add real testgen capabilities --output-format=json for LLM tools and wrappers
• Add Cursor, Cline, Continue, Roo Code, Gemini CLI, Claude Code, and OpenCode integration templates
• Fix/wire agent install scripts for all supported agent targets
• Add JSON schema docs for agent-readable output contracts
• Add provider profile docs and default profile examples
• Add adapter SDK contributor docs
• Add starter example projects and golden fixture structure for supported language families
• Update README, CLI reference, skill docs, roadmap, architecture docs, integrations docs, website landing page, and docs page

Validation

• golangci-lint run ./...
• go test ./...
• go build -o ./bin/testgen .
• ./bin/testgen doctor --path=. --output-format=json
• ./bin/testgen capabilities --output-format=json
• scripts/install-agent-integrations.sh "$tmp" copy

Notes

• Provider profiles are documented as the next config contract. Runtime behavior still follows existing flags and .testgen.yaml until profile selection is wired into config loading.

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Project	Deployment	Actions	Updated (UTC)
testgen-cli	Ready	Preview, Comment	Apr 30, 2026 3:34pm