Feature/add create table

[AlirezaEiji191379]

hi. in this commit i add support for create table query for mysql,postgresql,oracle,sqlserver and sqlite dbs. i add support for identity and auto increment and primary key and unique constraint. i add support for all the types in database. you can see the example of creating table in each db in prgram.cs in future commits i will add the support for create table as. temp table or permanent table are supprted in all dbs

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