Fastfetch: refactor command line option parsing code

1. improve performance
2. remove `-c`
3. rename `--recache` to `--logo-recache`, and remove `-r`

src/common/commandoption.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#ifndef FF_INCLUDED_common_commandoption
+#define FF_INCLUDED_common_commandoption
+
+#include "fastfetch.h"
+
+bool ffParseModuleCommand(const char* type);
+bool ffParseModuleOptions(const char* key, const char* value);
+
+#endif