chore: complete cronsnap cleanup and adapter hardening

[sidmohan0]

Summary

This PR completes the cleanup checklist against origin main, including runtime adapter refactor, command split, wrapper hardening, doc/spec cleanup, and CI gate expansion.

Scope completed

• Added cronsnap gate command and updated wrapper enforcement path:
  • /Users/sidmohan/Projects/cronsnap/cmd/cronsnap/cmd_gate.go
  • /Users/sidmohan/Projects/cronsnap/scripts/adapters/_common.sh
  • /Users/sidmohan/Projects/cronsnap/scripts/adapters/cronsnap-git-wrapper.sh
  • /Users/sidmohan/Projects/cronsnap/scripts/adapters/cronsnap-gh-wrapper.sh
  • /Users/sidmohan/Projects/cronsnap/scripts/adapters/cronsnap-gog-wrapper.sh
• Consolidated shim logic via shared helper:
  • /Users/sidmohan/Projects/cronsnap/cmd/cronsnap/shim.go
• Split command handlers for reviewability:
  • /Users/sidmohan/Projects/cronsnap/cmd/cronsnap/cmd_gate.go
  • /Users/sidmohan/Projects/cronsnap/cmd/cronsnap/cmd_hooks.go
  • /Users/sidmohan/Projects/cronsnap/cmd/cronsnap/cmd_doctor.go
  • /Users/sidmohan/Projects/cronsnap/cmd/cronsnap/cmd_init_onboard.go
  • /Users/sidmohan/Projects/cronsnap/cmd/cronsnap/cmd_run.go
  • /Users/sidmohan/Projects/cronsnap/cmd/cronsnap/cmd_status.go
• Added/expanded tests:
  • /Users/sidmohan/Projects/cronsnap/cmd/cronsnap/main_test.go
• Added dedicated wrapper smoke checks:
  • /Users/sidmohan/Projects/cronsnap/scripts/ci/cs-gh-wrapper-smoke.sh
  • /Users/sidmohan/Projects/cronsnap/scripts/ci/cs-gog-wrapper-smoke.sh
  • expanded /Users/sidmohan/Projects/cronsnap/scripts/ci/cs-git-wrapper-smoke.sh
• Removed legacy he-* scripts and updated lint/doc registrations.
• Archived completed plans under docs/plans/completed and updated tracker in:
  • /Users/sidmohan/Projects/cronsnap/docs/plans/tech-debt-tracker.md
• Removed stale/deleted docs and updated domain/docs indexes:
  • /Users/sidmohan/Projects/cronsnap/docs/FRONTEND.md (removed)
  • /Users/sidmohan/Projects/cronsnap/docs/DOMAIN_DOCS.md
  • /Users/sidmohan/Projects/cronsnap/scripts/ci/cs-docs-config.json
• Updated root docs and README for gate/wrapper behavior and machine-readable payloads.

Validation

• go vet ./...
• go test ./...
• staticcheck ./... (golangci-lint not installed in env)
• bash scripts/ci/cs-plans-lint.sh
• bash scripts/ci/cs-spikes-lint.sh
• bash scripts/ci/cs-specs-lint.sh
• bash scripts/ci/cs-docs-lint.sh
• bash scripts/ci/cs-runbooks-lint.sh
• bash scripts/ci/cs-git-wrapper-smoke.sh
• bash scripts/ci/cs-gh-wrapper-smoke.sh
• bash scripts/ci/cs-gog-wrapper-smoke.sh
• go test ./cmd/cronsnap -run 'TestCanJSON|TestStatusJSON|TestHooksEnable|TestCreate...'

Notes

• cs-docs-lint still reported one pre-existing warning in docs/design-docs/core-beliefs.md; this PR replaces seed placeholders to remove that warning.