How to create a basic base type extension in PostgreSQL

Find the source code here: https://github.com/mohammadzainabbas/student-in-postgres Learn about some basic requirements of creating a base type in C language: https://www.postgresql.org/docs/13/xfunc-c.html Documentation about some built-in errors reporting: https://www.postgresql.org/docs/13/error-message-reporting.html Documentation about creating your type in SQL: https://www.postgresql.org/docs/13/sql-createtype.html Documentation about creating your function in SQL: https://www.postgresql.org/docs/13/sql-createfunction.html Documentation about the "control" file: https://www.postgresql.org/docs/current/extend-extensions.html#id-1.8.3.20.11