[Docs] Evaluated Permissions References (#1250)

* Docs / Permissions Overwrites Reference

* Docs / Evaluated Permissions Reference

* Clarify role.permissions is not evaluated

* Update Role.js

src/structures/Role.js

@@ -55,7 +55,7 @@ class Role {
     this.position = data.position;
 
     /**
-     * The evaluated permissions number
+     * The permissions bitfield of the role
      * @type {number}
      */
     this.permissions = data.permissions;