Fixes and refactors

[Lettify]

This pull request includes a small change to the web/src/pages/[func].astro file. It updates the funcPair link to prepend a forward slash (/), ensuring the link resolves correctly as a relative path.

In the previous code, when clicking on the pair function, the user was redirected to a non-existent page but the URL was displayed as a page relative to the current page where the user was.

For example, I was on the /setElementHealth page, when I tried to access the pair function I went to /setElementHealth/getElementHealth.

[Lettify]

I realized that it may be necessary (I've already added it to the function schema) to have an optional property to specify whether the function has optional parameters.

[Fernando-A-Rocha]

Thank you for having done the funcPair / fix. If you remove the other changes you made I can accept this PR.

Also, we need to "build" the syntax of functions to display it. It's a bit complex because you need to consider several cases: client only functions, server only functions, shared only functions that can have a shared syntax OR a different syntax for client/server if either a parameter is different or a return value is different.
@Lettify

[Nico8340]

Please resolve conflicts @Lettify

[Lettify]

Please resolve conflicts @Lettify

Providing that

[Nico8340]

Fair enough

[Fernando-A-Rocha]

Build failed. You forgot to update the rest of the functions' notes.