docs: a true "5 minutes to Hello World" for x.klickd getting-started

[Davincc77]

Summary

Docs-only. Rewrites docs/getting-started.md as a tighter, more direct "5 minutes to Hello World" for x.klickd, aimed at reducing time-to-first-success.

• Clear promise up top: load one x.klickd starter skill, turn it into model context, see the output — no account, no server, no API key.
• Front-loads a verified dry-run path (Python + TypeScript) with the exact expected output, before any caveats. No LLM call required for the smoke test.
• Integrations table moved after the quick path, not before, with the richer comparison linked afterward.
• Encrypted-envelope details, load_klickd/loadKlickd, and the dual loader demoted to Next so they don't block the first success. "Compressed memory is optional" noted there.
• Net shorter: ~443 → ~412 words.

Guardrails preserved

• No automatic GDPR / EU AI Act compliance claim (claim boundary kept verbatim).
• No universal-standard / universal-native-support wording.
• No benchmark or performance claims.
• Compressed memory explicitly optional.

Why README is barely touched

The README quickstart already links to this page in a single line and is not over-expanded, so no README change was needed (requirement 7 — adjust only if it now duplicates too much). Left as-is.

Checks

• Dry-run verified locally (installed packages/pypi/klickd, ran the Python snippet): output is exactly x.klickd/coding / False, matching the doc.
• Package/API names verified against repo: klickd (PyPI), @klickd/core (npm), get_starter_skill_bytes / getStarterSkillBytes, and the x_klickd_pack.pack / encrypted fields all confirmed in source.
• All 15 relative links resolve to real files.
• markdownlint (default ruleset, repo has no config): 20 hits vs 23 on the original — net improvement, no new rule categories; remaining hits are line-length/table-style defaults the repo does not enforce.

Testing

• pip install -e packages/pypi/klickd + run Python snippet -> expected output
• Link existence check (15/15)
• Guardrail grep (claim boundary present; forbidden phrasing absent)
• Maintainer review

Docs-only; please do not merge without Vince's review.

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