docs(readme): clarify official source and add poster

Explain how to add the official source and develop, package, and install Curios.
Use the selected blue-and-white illustration as the README hero and preserve the poster variants and prompts for reference.

Validation: documentation links and anchors checked; CLI static starter creation, check, and pack passed; image dimensions and asset links verified.
This commit is contained in:
2026-09-14 09:40:10 +08:00
parent e13f157dce
commit 177c7572c8
10 changed files with 228 additions and 12 deletions
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