Add Versioning for local adaptor

[Quitehours]

Adding Versioning for Local Prompts

Description of Changes

This PR introduces support for versioning local prompts in LlmEvalRuby::PromptAdapters::Local. Now, a prompt version can be specified, allowing for testing and gradual deployment of updated versions without affecting existing ones.

Changes:

• Added a version parameter to the fetch_prompt method.
• The prompt path now includes the version: lib/prompts/{name}/{version}/system.txt and lib/prompts/{name}/{version}/user.txt.
• Removed recursive Dir.glob calls; files are now fetched using a strict path.
• Updated class documentation.

Example File Structure:

lib/prompts/test
├── system.txt
├── user.txt
└── v2
    ├── system.txt
    └── user.txt
└── v3
    ├── system.txt
    └── user.txt

Reasons for Changes:

• Improved flexibility in handling prompts.
• Ability to roll back to previous versions if needed.
• Simplifies testing and deployment of new prompt versions.

How to Test:

1. Call LlmEvalRuby::PromptAdapters::Local.fetch_prompt(name: "test", version: "v2").
2. Ensure the correct version of the prompt is loaded.
3. Verify that when no version is specified, the default prompt is loaded.

Backward Compatibility

This PR maintains backward compatibility: if no version is specified, the behavior remains unchanged.

[mesmerze]

👍

[ihor-tokaryk]

👍