feat(client-cpp): add basic TableModel settings & insertRelationalTablet interface

[xiangmy21]

Description

Added initial table model support for the C++ client. The main changes include:

• Added sqlDialect and database members to the Session class.
• Added columTypeList member to the Tablet class to identify column types.
• Added insertRelationalTablet function to support inserting Table Model Tablets.
• Added sessionRelationalIT.cpp test.
• Added TableModelSessionExample.cpp example.
• Extracted a TableSession class to support TableModel operations.

[github-actions]

Hi, this is your first pull request in IoTDB project. Thanks for your contribution! IoTDB will be better because of you.