docs(wiki): rewrite guides and replace misleading screenshots Rewrite all guides around the actions readers need to take. Replace repeated or mismatched screenshots, show complete controls, and use copyable commands for terminal setup. Correct token, lifecycle, deployment, and backup instructions. Co-Authored-By: GPT-5 <noreply@openai.com>
docs: add visual wiki guides Refs #389
docs: add Caelestis operator wiki guides Adds self-hosting, credentials, upgrades, storage, troubleshooting, contributor, and maintainer guidance. Refs #389