feat: move prompts to text files and reference them in config.yaml

[RAWx18]

feat: move prompts to external text files and update config.yaml with file paths

• Extracted prompt content from codebase into dedicated .txt files
• Updated config.yaml to reference new file paths
• Improves prompt management and maintainability

[sancheet230]

@RAWx18 I think the current system is flexible and user friendly since we don't have very large prompts so yaml file can handle them with good readability and feature for changing prompts is already a provided feature for admins from UI
And this PR I think will remove the ability to edit prompts via the web UI which is a important feature as of now. It also increases code complexity and risks sync issues between files and the app

[RAWx18]

I did it because it was asked in last meet.

[sancheet230]

I did it because it was asked in last meet.

@RAWx18 So rather then just referencing you can update and use the utility function to read and write prompt files and should update the UI thing accordingly as well by my thought after all this it will not affect the UI prompt editing feature