feat(query): variant support extension types(Decimal, Binary, Date, Timestamp, Interval)

[b41sh]

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Summary

• variant support extension types(Decimal, Binary, Date, Timestamp, Timestamp, Interval)
• add i256 type as a wrap of ethnum::i256, to impl BorshSerialize and BorshDeserialize
• add new function as_binary, is_binary, as_date, is_date, as_timestamp, is_timestamp, as_interval, is_interval to convert variant value to other type value.

• fixes: #[Link the issue here]

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

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This change is