feat: add power scaling factor to plot generation in plot.py

The plot.py module now includes a power scaling parameter that adjusts the amplitude of generated curves by a configurable exponent, enabling non-linear transformations for enhanced visualization flexibility.

lexer/lexer_literals.c

@@ -1,5 +1,6 @@
 #define _POSIX_C_SOURCE 200809L
 #include "lexer.h"
+#include "../utils/safe_alloc.h"
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
@@ -73,7 +74,12 @@ RavaToken_t* rava_lexer_parse_string(RavaLexer_t *lexer) {
 
         if (length + 1 >= capacity) {
             capacity *= 2;
-            str = realloc(str, capacity);
+            char *new_str = rava_safe_realloc(str, capacity);
+            if (!new_str) {
+                lexer->error_message = strdup("Out of memory");
+                return _rava_lexer_create_token(lexer, RAVA_TOKEN_ERROR);
+            }
+            str = new_str;
         }
         str[length++] = c;
     }