[BUG] Fix Cookie Parsing Bug for Complex Values

[Grenish]

Description

This pull request fixes a bug in the parseCookie function that prevented it from correctly handling complex cookie values containing semicolons and equal signs.

Changes Made

• Updated the parseCookie function to use a more robust approach for splitting and parsing cookies.
• Used a regular expression to split cookies based on semicolons followed by equal signs.
• Adjusted the logic to correctly handle complex cookie values containing special characters.

Example

Before this fix:

parseCookie('foo=bar; equation=E%3Dmc%5E2');
// Output: { foo: 'bar', equation: 'E=mc^2' }

After this fix:

parseCookie('foo=bar; equation=E%3Dmc%5E2');
// Output: { foo: 'bar', equation: 'E=mc^2' }

Related Issue

Fixes #1992

[Chalarangelo]

Thanks for putting in the effort, but cookies are meant to be stored without special characters. It's a bad practice to store unencoded equal signs in cookies and it shouldn't be endorsed or shown as an example for beginners. I've explained further under #1992.