This PR incorporates the changes from #419

Key changes:

• Moved to ai/skills/code-engine-specialist
• Make description more concise (60 characters)
• Reduce size by splitting into cli-reference, troubleshooting and patterns.
• Used IBM Bob's create-skill skill to write the reference in a concise and procedural fashion
• change to ubi10 where image exists
• small typo

The PR also adjusts the Blog post "deploy-from-bob"

Pls test from here:

• deploy from bob: https://github.com/jeremiaswerner/CodeEngine/blob/code-engine-skill-2/content/posts/deploy-from-bob/index.md
• skill installation link: https://github.com/jeremiaswerner/CodeEngine/tree/code-engine-skill-2/ai/skills/code-engine-specialist

Note, that the split requires to configure IBM Bob with:

Allow outside workspace tools - In the IBM Bob chat -> Settings (icon) -> Chat -> Allow outside workspace tool requests