feat(settings): implement CLI installation feature

[Red-Asuka]

PR Checklist

What is the new behavior?

• MQTTX Web now displays an option to install the CLI. Clicking it redirects to the CLI download page.
• Replaced axios with fetch.
• Fixed the sudoInstall method, converting sudo.exec from a callback-based to a Promise-based implementation.
• Optimized code logic by removing unnecessary events and parameters.
• Enhanced type-checking to improve code maintainability.

Does this PR introduce a breaking change?

• Yes
• No

Specific Instructions

Are there any specific instructions or things that should be known prior to review?

Other information