feat(type): add support for double precision

[crwen]

What problem does this PR solve?

Add support for double precision LogicalType. This is the same to double or float(8)

Issue link: #130

What is changed and how it works?

Code changes

• Has Rust code change
• Has CI related scripts change

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Note for reviewer

[KKould]

I think this PR has fully implemented this feature, but it seems that since Double and DoublePrecision types are highly consistent, then we only support LogicType::Double and use TryFrom<sqlparser::ast::DataType> for LogicalType
code_url Is converting DoublePrecision to Double a simpler and lower maintenance option?

[crwen]

But when using DESCRIBE table, the type of double precision will be Double but not DoublePrecision. Is it OK to do so?

[KKould]

But when using DESCRIBE table, the type of double precision will be Double but not DoublePrecision. Is it OK to do so?

I think it's okay

[KKould]

Thanks for your contribution.