feat: Add comments to AST nodes

This commit introduces support for comments within the AST nodes.
Comments are now parsed by the lexer and stored within the `Token`
struct.
These comments are then propagated through various compiler phases,
including
the `Node` struct, ensuring they are preserved in the Abstract Syntax
Tree.
This change enhances the AST's ability to retain source code
information,
which can be valuable for debugging and analysis.

examples/object_records.myc

@@ -1,5 +1,5 @@
-;; Benchmark: 1.2us
-;; Benchmark-Repeat: 1731
+;; Benchmark: 1.2us
+;; Benchmark-Repeat: 1731
 ;; Output: [150 130 "Insufficient funds" 130]
 
 ; ---------------------------------------------------------
@@ -36,10 +36,12 @@
 
   ; 2. Call 'deposit' method
   ; Note the double parens: (.deposit my-acc) gets the function, then we call it
-  (def b1 ((.deposit my-acc) 50)) ; balance is now 150
+  ; balance is now 150
+  (def b1 ((.deposit my-acc) 50)) 
 
   ; 3. Call 'withdraw' method
-  (def b2 ((.withdraw my-acc) 20)) ; balance is now 130
+  ; balance is now 130
+  (def b2 ((.withdraw my-acc) 20)) 
 
   ; 4. Call 'withdraw' with invalid amount
   (def error-msg ((.withdraw my-acc) 1000))