Update Theme + Add Mobile

[ellraiser]

This changes the html generator to be a little bit more consistent with the different module/funtion/type/enum blocks, as well as adds a mobile menu.

I've then updated the styling a bit, main changes are:

• made all links consistent and also made each block header have the same hash link for easy copying
• made all modules/function/type/enum have distinct "blocks" for readability
• updated argument+return tables to match the order you'd expect for functions
• clearer TOCs for each module
• tweaked some colors on light theme for better background contrast
• added a theme override toggle button (currently theme is determined by OS preference)

Can view the updates here: https://ellraiser.github.io/love-api/

Let me know if you want to change anything or if you want me to add anything else!

[MikuAuahDark]

I plan to rewrite the HTML generator code to make it cleaner but I'll merge this to preserve the contribution. The new HTML output looks better. Thank you.