feat: Allow file tool access to companion files under ~/.cptr/skills/

[Aspect250]

I have encountered a problem regarding the current skills implementation not allowing native tools to access files other than the SKILL.md in the global skills directory.

view_skill works for the SKILL.md, but any reference files wanted by the skill can only be called via terminal using cat for the reference files as read_file etc are rejected as the global skills folder is a "Path outside allowed directories".

This is not ideal for any skill that is more than just the SKILL.md file, like those that adhere to the Agent Skills standard

If we can get this looked at and allow file tools to read from ~/.cptr/skills/ that would be great.

[owui-terminator]

⚠️ Missing Issue Title Prefix

@Aspect250, your issue title is missing a categorising prefix (e.g. bug:, feat:, docs:).

Please update the title to lead with one of:

• bug: bug report or error
• feat: feature request or enhancement
• docs: documentation issue
• question: usage question
• help: support request

Example: bug: Login fails when the password contains special characters

[owui-terminator]

🔍 Related Issues Found

I found some existing issues that might be related. Please check if any of these are duplicates or contain helpful solutions:

1. 🟣 #107 feat: Add ~/.agents/skills as a global skill directory
   This issue is about global skill directories and skill discovery, which is directly related to the new request to support companion files under the global skills folder. It shows prior discussion around how skills are mounted/located across the filesystem.
   by 0be30301

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💡 If your issue is a duplicate, please close it and add any additional details to the existing issue instead.

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