feat: some extensions to kernel standard c library. Other minor

improvements and formats

include/ctype.h

@@ -0,0 +1,38 @@
+//
+// Created by rick on 25-03-21.
+//
+
+#ifndef NEW_KERNEL_CTYPE_H
+#define NEW_KERNEL_CTYPE_H
+
+inline int tolower(int c);
+
+int toupper(int c);
+
+int isalnum(int c);
+
+int isalpha(int c);
+
+int iscntrl(int c);
+
+int isdigit(int c);
+
+int isgraph(int c);
+
+int islower(int c);
+
+int isprint(int c);
+
+int ispunct(int c);
+
+int isspace(int c);
+
+int isupper(int c);
+
+int isxdigit(int c);
+
+int isascii(int c);
+
+int isblank(int c);
+
+#endif //NEW_KERNEL_CTYPE_H