feat: impl Explain

[KKould]

What problem does this PR solve?

> 🖕🖕🏻🖕🏼🖕🏼🖕🏾🖕🏿 <
explain select c1 from t1 where c1 + 1 = 1 or c2 > 1

+------------------------------------------------------------+
| PLAN                                                       |
+============================================================+
| Projection [c1] [Project]                                  |
|   Filter ((c1 = 0) || (c2 > 1)), Is Having: false [Filter] |
|     Scan t1 -> [c1, c2] [SeqScan]                          |
+------------------------------------------------------------+
Row len: 1

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