TableEngine and SqlHandler impl (#45)

* Impl TableEngine, bridge to storage

* Impl sql handler to process insert sql

* fix: minor changes and typo

* test: add datanode test

* test: add table-engine test

* fix: code style

* refactor: split out insert mod from sql and minor changes by CR

* refactor: replace with_context with context

src/storage/src/test_util/descriptor_util.rs

@@ -57,6 +57,7 @@ impl RegionDescBuilder {
 
     pub fn build(self) -> RegionDescriptor {
         RegionDescriptor {
+            id: 0,
             name: self.name,
             row_key: self.key_builder.build(),
             default_cf: self.default_cf_builder.build(),