feat(frontend): create query handler

[cykbls01]

What's changed and what's your intention?

implement query handler

Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests

Refer to a related PR or issue link (optional)

#698

[codecov]

Codecov Report

Merging #907 (2e66511) into main (044cff6) will decrease coverage by 0.04%.
The diff coverage is 25.58%.

@@             Coverage Diff              @@
##               main     #907      +/-   ##
============================================
- Coverage     72.49%   72.44%   -0.05%     
  Complexity     2766     2766              
============================================
  Files           936      937       +1     
  Lines         55268    55322      +54     
  Branches       1787     1787              
============================================
+ Hits          40067    40079      +12     
- Misses        14311    14353      +42     
  Partials        890      890              

Flag	Coverage Δ
java	61.23% <ø> (ø)
rust	76.91% <25.58%> (-0.08%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../frontend/src/optimizer/plan_node/batch_project.rs	0.00% <0.00%> (ø)
...t/frontend/src/optimizer/plan_node/batch_values.rs	0.00% <0.00%> (ø)
rust/frontend/src/handler/query.rs	21.21% <21.21%> (ø)
rust/frontend/src/handler/mod.rs	83.33% <100.00%> (-7.58%)	⬇️
rust/rpc_client/src/compute_client.rs	74.13% <100.00%> (-19.05%)	⬇️
rust/meta/src/hummock/compaction.rs	81.56% <0.00%> (-0.56%)	⬇️
rust/common/src/types/ordered_float.rs	25.82% <0.00%> (+0.33%)	⬆️
rust/meta/src/cluster/mod.rs	74.29% <0.00%> (+0.35%)	⬆️
... and 1 more

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[neverchanje]

Suggested change

	select_list: vec![],
	select_list: self.logical.exprs.iter().map(|e| e.to_prost()),

You can fully implement this in later pr, it should not be left blank.
I've glanced at ExprImpl and it seems to have no to_prost, it'd need some work.