feat(dbml/connector): add sqlite and oracle connectors

[HungKNguyen]

Summary

• Added sqlite and oracle to the supported database for @dbml/connector

Issue

(issue link here)

Lasting Changes (Technical)

(please list down: code changes/things that have wide-effect; new libraries/functions added that can be used by others; examples below)

• (Added class EmailValidator to validate email address' validity)
• (Added Tenant#is_trial? check)

Checklist

Please check directly on the box once each of these are done

• Documentation (if necessary)
• Tests (integration test/unit test)
• Integration Tests Passed
• Code Review

[nguyenalter]

Please add the default SCHEMA_NAME = 'main' and define a method to get full table name, for example:

const getFullTableName = (tbName) => `${SCHEMA_NAME}.${tbName}`;

Then, you can use the getFullTableName method in your maps below

[HungKNguyen]

I think you want getFullColumnName right? So that the columnsWithEnum's key can be generated by the same function

[nguyenalter]

You also need to add cli support for db2dbml oracle <connection> command. You can follow my sample commit (2a6e73c)

[nguyenalter]

@HungKNguyen Can you change the head of your fork to a branch that I can commit. It is https://github.com/PSPDFKit-labs/dbml/tree/master now.
I want to add test and update CI for oracle connector.

[HungKNguyen]

@HungKNguyen Can you change the head of your fork to a branch that I can commit. It is https://github.com/PSPDFKit-labs/dbml/tree/master now.
I want to add test and update CI for oracle connector.

@nguyenalter I had to open another PR to change the base branch #750