[BUG] - Kaiban Proxy Compatibility issues with Windows environments due to invalid directory names

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Describe the Bug

KaibanJS Proxy -> https://github.com/kaiban-ai/kaiban-llm-proxy

Encounters compatibility issues on Windows environments when handling directory or file names that include invalid characters, such as colons (:). This prevents the creation of necessary directories and disrupts workflows when trying to integrate external models or APIs.

KaibanJS Team Config

This issue can occur in any setup where directory paths include characters not allowed in Windows file systems. Example configuration:

• apiBaseUrl: Custom endpoint with a model hosted in a directory containing invalid characters.

Steps to Reproduce

1. Set up a KaibanJS configuration file with a custom apiBaseUrl that points to a directory including invalid characters (e.g., app/llm/google/v1beta/models/model-name).
2. Run the project in a Windows environment.
3. Observe the error when the system attempts to create or reference the directory.

Current vs. Expected Behavior

Current behavior: The system fails to create directories and throws errors due to the presence of invalid characters in file paths.

Expected behavior: KaibanJS should sanitize directory and file paths to ensure compatibility with Windows, avoiding the use of invalid characters.

Environment

• Framework/Library: NodeJS
• KaibanJS Version: [e.g., 0.1.0]
• JavaScript Runtime: NodeJS
• OS: Windows 10/11