Move sql views to a .sql file

pkg/schema/views.sql

@@ -0,0 +1,20 @@
+create temporary view tables as
+    select l.schema, l.name, l.type, l.ncol, l.wr, l.strict
+        from sqlite_schema s
+    left join pragma_table_list l on s.name = l.name
+        where s.type = 'table';
+
+create temporary view columns as
+    select tables.name as table_name,
+            table_info.name as column_name,
+            lower(table_info.type) as column_type,
+            "notnull",
+            dflt_value is not null as has_default_value,
+            ifnull(dflt_value, 0) dflt_value,
+            pk as is_primary_key,
+            fk."table" is not null as is_foreign_key,
+            ifnull(fk."table", '') as fk_target_table,
+            ifnull(fk."to", '') as fk_target_column
+        from tables
+        join pragma_table_info(tables.name) as table_info
+    left join pragma_foreign_key_list(tables.name) as fk on fk."from" = column_name;