Editor Help: Improve appearance of script property setters/getters

[dalexeev]

• Extracted from Editor: Improve signal callback generation #79366 for easier review.
• Closes [4.0] GDScript custom class documentation doesn't mention name of setter / getter methods #68317.

## a description.
var a = 1:
    set(value):
        a = value
    get:
        return a

## b description.
var b = 2: set = set_b, get = get_b

func set_b(value):
    b = value

func get_b():
    return b

[dalexeev]

I added this to prevent user confusion. Ironically, the following code works:

call("@a_setter", 123)

[dalexeev]

1. Undocumented setter/getter functions are not displayed (this should be documented here), but documented ones are now displayed.
2. Fixed signatures for setters/getters with additional arguments (registered via ADD_PROPERTYI() macro).
   • Online docs already shows this, but uses the full signature. I'm not sure if this makes sense, as it's more cumbersome and there is no info in DocData about the signatures of normal setters/getters.

## a description.
var a = 1:
    set(value): a = value
    get: return a

## b description.
var b = 2: set = set_b, get = get_b
func set_b(value): b = value
func get_b(): return b

## c description.
var c = 3: set = set_c, get = get_c
## set_c description.
func set_c(value): c = value
## get_c description.
func get_c(): return c

[Mickeon]

Are you interested in reworking this PR, especially after your recent clean-up within EditorHelp?

[Mickeon]

While you're here

Suggested change

	const bool is_documented = prop.is_deprecated || prop.is_experimental || !prop.description.strip_edges().is_empty();
	bool is_documented = prop.is_deprecated || prop.is_experimental || !prop.description.strip_edges().is_empty();

[AThousandShips]

Not a requirement, personal preference

[Mickeon]

Suggested change

	const int argc = method.arguments.size();
	const int skip_flags = skip_methods[method.name];
	int argc = method.arguments.size();
	int skip_flags = skip_methods[method.name];

[Mickeon]

Suggested change

	const bool has_setter_link = method_line.has(prop.setter);
	bool has_setter_link = method_line.has(prop.setter);

[Mickeon]

Suggested change

	const bool has_getter_link = method_line.has(prop.getter);
	bool has_getter_link = method_line.has(prop.getter);