orm: redesign orm (re-write it in V) (#10353)

examples/database/orm.v

@@ -1,6 +1,6 @@
 import sqlite
 import mysql
-import pg
+// import pg
 
 [table: 'modules']
 struct Module {
@@ -33,11 +33,11 @@ struct Child {
 fn main() {
 	sqlite3_array()
 	mysql_array()
-	psql_array()
+	// psql_array()
 
 	sqlite3()
 	mysql()
-	psql()
+	// psql()
 }
 
 fn sqlite3_array() {
@@ -118,6 +118,7 @@ fn mysql_array() {
 	db.close()
 }
 
+/*
 fn psql_array() {
 	mut db := pg.connect(host: 'localhost', user: 'test', password: 'abc', dbname: 'test') or {
 		panic(err)
@@ -155,7 +156,7 @@ fn psql_array() {
 	}
 
 	db.close()
-}
+}*/
 
 fn sqlite3() {
 	mut db := sqlite.connect(':memory:') or { panic(err) }
@@ -224,6 +225,7 @@ fn mysql() {
 	conn.close()
 }
 
+/*
 fn psql() {
 	mut db := pg.connect(host: 'localhost', user: 'test', password: 'abc', dbname: 'test') or {
 		panic(err)
@@ -257,4 +259,4 @@ fn psql() {
 
 	eprintln(modul)
 	db.close()
-}
+}*/