feat: allow kebab and snake case folders

[nimish-ks]

🔍 Overview

This PR expands the range of possible folder and path names beyond alphanumeric name by adding support snake_case and kebab-case paths.

The new regex pattern:

const folder_name_pattern = /^[a-zA-Z0-9_-]*$/

💡 Proposed Changes

• Updated the folder_name_pattern in NewFolderMenu

🖼️ Screenshots or Demo

📝 Release Notes

• Enhanced path handling to support kebab-case and snake_case in folder and path names.
• Users can now use paths like /backend/user-service/config or /frontend/user_profile/settings in their configurations.

✨ How to Test the Changes Locally

1. Create folder names with - and _ in the Phase Console
2. Fetch secrets via the CLI, API, SDKs etc.
3. Test secret referencing