[💄Feature]: Separate code from JSDOC types.

[wiseaidev]

👶 Getting Started
Please search the history to see if an issue already exists for the same problem.

• I have searched the existing issues.
• I have tested the latest version.

📝 Describe the feature
The following line of code is a prime example why we should separate code from types:

https://github.com/wiseaidev/flexify/blob/07b43237c134512f23e4e993b5e54da883a5fd82/scripts/popup.js#L315

Therefore, we should have a separate file to store all the types, namely types.js under the script folder that contains all type definitions, and then load them into the script.

📸 Screenshots
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🔦 Context
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