fixes(#1283): Add documentation for Multer functions

[arham-sayyed]

PR Title:

docs: Add documentation for Multer functions

fixes: #1283

#1283

Description:

This pull request adds comprehensive documentation for various Multer functions, improving code readability and helping developers understand the purpose and usage of each function. The following functions have been documented:

• allowAll
• Multer.prototype.single
• Multer.prototype.array
• Multer.prototype.fields
• Multer.prototype.none
• Multer.prototype.any
• Multer.prototype._makeMiddleware
• wrappedFileFilter

These additions aim to enhance the clarity of the codebase and provide better insight into the functionality of the Multer library.

Changes:

• Added JSDoc comments for all relevant functions.
• Provided detailed descriptions of each function's behavior and parameters.
• Improved inline documentation to support better developer experience.

Motivation and Context:

Clear documentation helps developers understand how to use the Multer library effectively. This PR aims to improve the usability and maintainability of the code.

Type of Change:

• Documentation update.

How to Test:

No testing required, as this is purely a documentation update. Review the code for clarity and accuracy of the added comments.

[IamLizu]

This adds a lot of changes, in internal methods as well. While the work is appreciated, I suggest changing the PR to DRAFT so that we do not accidentally land it before its ready as there's so much jsDoc to review.

cc: @UlisesGascon