Add HTTP and WebSocket templates

[aawadall]

Summary

• add HTTP and WebSocket server templates for Go, Node.js, Python and Java
• include transport-aware template mapping and dependencies
• mark REST and WebSocket transport as implemented in docs
• update version references to v0.4.2

Testing

• go test ./... -coverprofile=coverage.out
• go tool cover -func=coverage.out | tail -n 1

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https://chatgpt.com/codex/tasks/task_e_688b803def24832fa5a90791c41cf562

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.06% (target: -1.00%)	✅ 100.00%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (0f7e3a3)	1094	922	84.28%
Head commit (b0c96fa)	1098 (+4)	926 (+4)	84.34% (+0.06%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#71)	38	38	100.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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