Binary: add comments

src/util/binary.h

@@ -2,4 +2,17 @@
 
 #include "fastfetch.h"
 
+/**
+ * Extracts string literals from a binary file
+ *
+ * @param file Path to the binary file to extract strings from
+ * @param cb Callback function that will be called for each string found
+ *           Return false from callback to stop extraction
+ * @param userdata User-provided data passed to the callback function
+ * @param minLength Minimum length of strings to extract
+ *
+ * @return NULL on success, error message on failure.
+ * @note This function won't return an error if no strings are found.
+ *       Always check if strings are correctly extracted after this function all.
+ */
 const char* ffBinaryExtractStrings(const char* file, bool (*cb)(const char* str, uint32_t len, void* userdata), void* userdata, uint32_t minLength);