change to dynamic array for lexer and parser to speed up lexical analysis

src/dynamic_array/darray.h

@@ -0,0 +1,33 @@
+#ifndef DARRAY_H
+#define DARRAY_H
+
+#include <stddef.h>  // for size_t
+
+#define CHUNK_SIZE 16
+
+typedef struct {
+    void *data;
+    size_t element_size;
+    size_t size;
+    size_t capacity;
+} DArray;
+
+// Initializes the dynamic_array
+void darray_init(DArray *arr, size_t element_size);
+
+// Pushes an element onto the array
+void darray_push(DArray *arr, void *element);
+
+// Pops the last element, calling `free_data` if provided
+void darray_pop(DArray *arr, void (*free_data)(void *));
+
+// Gets a pointer to an element at index
+void *darray_get(DArray *arr, size_t index);
+
+// Frees the entire array and optionally each element
+void darray_free(DArray *arr, void (*free_data)(void *));
+
+// Resizes the array to a new size (internal use, but exposed)
+void darray_resize(DArray *arr, size_t new_size);
+
+#endif // DARRAY_H