Implementing addition operation for links with compact syntax and short doublet notation support

[Konard]

Develop a solution to support the addition operation for links, aiming to provide a compact syntax and short notation for doublets in programming languages that do not support short syntactic notation for creating tuples. Consider the possibility of using a decorator that returns a structure/class Doublet with a defined + operator, storing a reference to the link storage and the doublet identifier, as well as its values.

Examples of operations with links and their analogs with string concatenation:

Doublets Expression	String Concatenation
1 + 1 = (1 1)	"1" + "1" = "11"
(1 2) + (3 4) = ((1 2) (3 4))	"12" + "34" = "1234"
((a b) c) + (e (d f)) = (((a b) c) (e (d f)))	"abc" + "edf" = "abcedf"