Refactor Token to use Location struct

v0/location.h

@@ -0,0 +1,26 @@
+/**
+ * Location handling for error reporting.
+ */
+#ifndef LOCATION_H
+#define LOCATION_H
+
+#include <stddef.h>
+
+typedef struct {
+    /// @brief The name of the file where the token was found.
+    char* filename;
+
+	/// @brief The entire line of text where the token was found.
+	char* line_text;
+
+	/// @brief The length of the `line_text` string.
+	size_t line_text_length;
+
+	/// @brief The line number where the token was found.
+	int line;
+
+	/// @brief The column number where the token was found.
+	int column;
+} Location;
+
+#endif