[FL-1542], [FL-1603] Generate random name (#602)

* Lib: add random name library
* Text_input: add default text clearing
* All: rework all applications with new text_input API
* Nfc: fix removing dev file on save_name scene enter
* Lib: move all free radicals to toolbox and update API usage.

Co-authored-by: あく <alleteam@gmail.com>

lib/toolbox/hex.h

@@ -0,0 +1,20 @@
+#pragma once
+#include "stdint.h"
+#include "stdbool.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Convert ASCII hex value to nibble 
+ * 
+ * @param c ASCII character
+ * @param nibble nibble pointer, output
+ * @return bool conversion status
+ */
+bool hex_char_to_hex_nibble(char c, uint8_t* nibble);
+
+#ifdef __cplusplus
+}
+#endif