feat: modernize config

- config now is more toml like
- no need to declare all fields, it implements defaults
- no yanderedev code, introspection babbyyy 😎
- desktop and config files parser semi-unification
- misc tweaks all over (mainly allocation failures handling)

include/util.h

@@ -2,13 +2,14 @@
 #define UTILH_
 
 #include <stdbool.h>
+#include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <sys/types.h>
 
 #include "keys.h"
 
-enum keys find_keyname(char*);
+int find_keyname(enum keys* at, char* name);
 enum keys find_ansi(char*);
 void read_press(u_char*, char*);
 
@@ -18,7 +19,7 @@ struct Vector {
   void** pages;
 };
 
-struct Vector vec_new();
+extern const struct Vector VEC_NEW;
 int vec_resize(struct Vector*, size_t size);
 int vec_reserve(struct Vector*, size_t size);
 int vec_reserve_exact(struct Vector*, size_t size);