feat: Adds push_value_ref and extend_slice_of to MutableVector (#215)

* feat: Impl cmp_element() for Vector

* chore: Add doc comments to MutableVector

* feat: Add create_mutable() to DataType

Add `create_mutable()` to create a MutableVector for each DataType.
Implement ListVectorBuilder and NullVectorBuilder for ListType and
NullType.

* feat: Add ValueRef

ValueRef is a reference to value, could be used to avoid some allocation
when getting data from Vector. To support ValueRef, also implement a
ListValueRef for ListValue, but comparision of ListValueRef still
requires some allocation, due to the complexity of ListValue and
ListVector.

Impl some From trait for ValueRef

* feat: Implement get_ref for Vector

* feat: Remove cmp_element from Vector

`cmp_element` could be replaced by `get_ref` and then compare

* feat: Implement push/extend for PrimitiveVectorBuilder

Implement push_value_ref() and extend_slice_of() for
PrimitiveVectorBuilder.

Also refactor the DataTypeBuilder trait for
primitive types to PrimitiveElement trait, adds necessary cast helper
methods to it.
- Cast a reference to Vector to reference arrow's primitive array
- Cast a ValueRef to primitive type
- Also make PrimitiveElement super trait of Primitive

* feat: Implement push/extend for all vector builders

Implement push_value_ref() and extend_slice_of() for remaining vector
builders. Add some helpful cast method to ValueRef and a method to
cast Value to ValueRef.

Change the behavior of PrimitiveElement::cast_xxx to panic when unable
to cast, since push_value_ref() and extend_slice_of() always panic
when given invalid input data type.

* feat: MutableVector returns error if data type unmatch

* test: Add tests for ValueRef

* feat: Add tests for Vector::get_ref

* feat: NullVector returns error if data type unmatch

* test: Add tests for vector builders

* fix: Fix compile error in python coprocessor

* refactor: Add lifetime param to IntoValueRef

The Primitive trait just use the `IntoValueRef<'static>` bound. Also
rename create_mutable to create_mutable_vector.

* chore: Address CR comments

* feat: Customize PartialOrd/Ord for Value/ValueRef

Panics if values/refs have different data type

* style: Fix clippy

* refactor: Use macro to generate body of ValueRef::as_xxx

src/script/src/python/coprocessor.rs

@@ -296,9 +296,7 @@ fn create_located<T>(node: T, loc: Location) -> Located<T> {
 }
 
 /// cast a `dyn Array` of type unsigned/int/float into a `dyn Vector`
-fn try_into_vector<T: datatypes::types::Primitive + datatypes::types::DataTypeBuilder>(
-    arg: Arc<dyn Array>,
-) -> Result<Arc<dyn Vector>> {
+fn try_into_vector<T: datatypes::types::Primitive>(arg: Arc<dyn Array>) -> Result<Arc<dyn Vector>> {
     // wrap try_into_vector in here to convert `datatypes::error::Error` to `python::error::Error`
     Helper::try_into_vector(arg).context(TypeCastSnafu)
 }