Add code examples for is_equivalent.

[bruvzg]

Add sample code for #104597

[Mickeon]

I know you're trying really hard to save vertical space here but this code snippet will be difficult to read in both the online and built-in class reference.
Even when proposing changes it's difficult to navigate for the sheer length.

[Mickeon]

The following changes are done assuming I understand these methods right. Something may be wrong but the idea is here

Also, quoting myself:

Beware of C# differences. GD.Print() outputs "True" and "False", trims the trailing .0, and outputs enum constants' names instead of their value.

Suggested change

	var dir = DirAccess.open("/")
	print(dir.is_equivalent("/sbin/md5sum", "/sBin/MD5Sum")) # Prints `true` on a case-insensitive filesystem, `false` otherwise.
	dir.create_link(ProjectSettings.globalize_path("res://icon.svg"), ProjectSettings.globalize_path("res://icon2.svg"))
	print(dir.is_equivalent(ProjectSettings.globalize_path("res://icon.svg"), ProjectSettings.globalize_path("res://icon2.svg"))) # Prints `true`, symbolic link.
	dir.remove(ProjectSettings.globalize_path("res://icon2.svg"))
	dir.copy(ProjectSettings.globalize_path("res://icon.svg"), ProjectSettings.globalize_path("res://icon2.svg"))
	print(dir.is_equivalent(ProjectSettings.globalize_path("res://icon.svg"), ProjectSettings.globalize_path("res://icon2.svg"))) # Prints `false`, identical file copy.
	dir.remove(ProjectSettings.globalize_path("res://icon2.svg"))
	[/gdscript]
	[csharp]
	using var dir = DirAccess.Open("/");
	GD.Print(dir.IsEquivalent("/sbin/md5sum", "/sBin/MD5Sum")); // Prints `true` on a case-insensitive filesystem, `false` otherwise.
	dir.CreateLink(ProjectSettings.GlobalizePath("res://icon.svg"), ProjectSettings.GlobalizePath("res://icon2.svg"));
	GD.Print(dir.IsEquivalent(ProjectSettings.GlobalizePath("res://icon.svg"), ProjectSettings.GlobalizePath("res://icon2.svg"))); // Prints `true`, symbolic link.
	dir.Remove(ProjectSettings.GlobalizePath("res://icon2.svg"));
	dir.Copy(ProjectSettings.GlobalizePath("res://icon.svg"), ProjectSettings.GlobalizePath("res://icon2.svg"));
	GD.Print(dir.IsEquivalent(ProjectSettings.GlobalizePath("res://icon.svg"), ProjectSettings.GlobalizePath("res://icon2.svg"))); // Prints `false`, identical file copy.
	dir.Remove(ProjectSettings.GlobalizePath("res://icon2.svg"));
	var dir = DirAccess.open("/")
	# Prints "true" on a case-insensitive filesystem, "false" otherwise.
	print(dir.is_equivalent("/sbin/md5sum", "/sBin/MD5Sum"))
	var icon_1_path = ProjectSettings.globalize_path("res://icon.svg")
	var icon_2_path = ProjectSettings.globalize_path("res://icon2.svg")
	dir.create_link(icon_1_path, icon_2_path)
	# Prints `true`, icon_2_path points to a symbolic link.
	print(dir.is_equivalent(icon_1_path, icon_2_path))
	dir.remove(icon_2_path)
	dir.copy(icon_1_path, icon_2_path))
	# Prints `false`, icon_2_path points to an identical copy.
	print(dir.is_equivalent(icon_1_path, icon_2_path))
	dir.remove(icon_2_path)
	[/gdscript]
	[csharp]
	using var dir = DirAccess.Open("/");
	// Prints "True" on a case-insensitive filesystem, "False" otherwise.
	GD.Print(dir.IsEquivalent("/sbin/md5sum", "/sBin/MD5Sum"));
	var icon1Path = ProjectSettings.GlobalizePath("res://icon.svg")
	var icon2Path = ProjectSettings.GlobalizePath("res://icon2.svg")
	dir.CreateLink(icon1Path, icon2Path);
	// Prints `True`, symbolic link.
	GD.Print(dir.IsEquivalent(icon1Path, icon2Path));
	dir.Remove(icon2Path);
	dir.Copy(icon1Path, icon2Path);
	// Prints `False`, identical file copy.
	GD.Print(dir.IsEquivalent(icon1Path, icon2Path));
	dir.Remove(icon2Path);

We could actually go a step further and rename the path variables to be less generic, in reference to what they're used for here (symlink vs copy)

[Mickeon]

One time it's i.e., another time it's e.g.. I think we should begin not using both outright.

Suggested change

	Returns [code]true[/code] if paths [param path_a] and [param path_b] resolve to the same file system object (taking into account case sensitivity, relative paths, symbolic links, and hard links). Returns [code]false[/code] otherwise, even if the files are bit-for-bit identical (i.e. identical copies of a file that are not symbolic links).
	Returns [code]true[/code] if paths [param path_a] and [param path_b] resolve to the same file system object (taking into account case sensitivity, relative paths, symbolic links, and hard links). Returns [code]false[/code] otherwise, even if the files are exactly identical (copies of a file that are not symbolic links).

[Mickeon]

Not going to highlight every occurrence of this but they should be surrounded by quotation marks. I guess it's my bad for not noticing sooner.

Suggested change

	# Prints `true`, icon_2_path points to a symbolic link.
	# Prints "true", icon_2_path points to a symbolic link.