Use a floating-point number for the timeout property in HTTPRequest

[Calinou]

This allows for greater precision when specifying a timeout in HTTPRequest in 3.x, similar to what is already possible in master.

This also improves the documentation (which could also be added to master).

See godotengine/godot-proposals#4419.

[Faless]

See my suggestions to avoid CMP_EPSILON for readability.

[Faless]

A was about to merge this, but isn't this a script-breaking change?

func some_func():
  var timeout : int = $HTTPRequest.timeout

I guess it's a rare instance, but it's worth mentioning maybe?

[akien-mga]

A was about to merge this, but isn't this a script-breaking change?

func some_func():
  var timeout : int = $HTTPRequest.timeout

I guess it's a rare instance, but it's worth mentioning maybe?

In GDScript, it seems to be happy to do implicit conversion:

	var timeout : int = 1.8
	print(timeout)   # 1

But that would likely be more breaking for C# and GDNative indeed.

[akien-mga]

After discussion, we found that the slight compat breakage is ok for 3.5 and it will be pointed out in the # Changed section of the changelog, together with a few other theoretically API breaking changes done in 3.5 (like the new Navigation API).

[akien-mga]

Thanks!