feat: test monitors in manage monitor dashboard

[rajnandan1]

This pull request includes updates to the configuration files, enhancements to the monitorsAdd.svelte component, and refactoring in the server-side code. The most important changes are summarized below:

Configuration Updates:

• Updated printWidth settings in .prettierrc to 120 for various configurations. [1] [2] [3]
• Bumped the version in package.json from 3.0.12 to 3.0.13.

Component Enhancements:

• Added a new testMonitor function and integrated it with a dropdown menu in monitorsAdd.svelte to allow testing of monitors. [1] [2]
• Introduced DropdownMenu component for better UI interactions. [1] [2]

Refactoring and Code Cleanup:

• Simplified the structure of HTML elements and bindings in monitorsAdd.svelte for better readability and consistency. [1] [2] [3] [4] [5] [6] [7] [8]
• Refactored constants and imports in constants.js and cron-minute.js for better modularity and maintainability. [1] [2] [3] [4] [5]