feat: implement insert and improve select

[jjeffcaii]

What this PR does:

1. implement INSERT
2. use the latest parser
3. improve SELECT, support full-scan switch

Which issue(s) this PR fixes:

Fixes #101

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[jjeffcaii]

PS: merge it after #91

[codecov-commenter]

Codecov Report

Merging #106 (31fd977) into master (768d18b) will increase coverage by 0.98%.
The diff coverage is 51.69%.

@@            Coverage Diff             @@
##           master     #106      +/-   ##
==========================================
+ Coverage   34.45%   35.43%   +0.98%     
==========================================
  Files          69       69              
  Lines       10795    10944     +149     
==========================================
+ Hits         3719     3878     +159     
+ Misses       6637     6621      -16     
- Partials      439      445       +6     

Impacted Files	Coverage Δ
pkg/executor/redirect.go	13.38% <0.00%> (-0.49%)	⬇️
pkg/mysql/server.go	0.00% <0.00%> (ø)
pkg/runtime/ast/insert.go	32.94% <0.00%> (-2.96%)	⬇️
pkg/runtime/optimize/sharder.go	26.19% <0.00%> (-0.10%)	⬇️
pkg/runtime/runtime.go	3.33% <0.00%> (-0.11%)	⬇️
pkg/proto/rule/topology.go	92.59% <66.66%> (-7.41%)	⬇️
pkg/runtime/optimize/optimizer.go	55.23% <66.66%> (+18.39%)	⬆️
pkg/proto/rule/database_table.go	78.45% <70.58%> (+3.15%)	⬆️
pkg/runtime/ast/ast.go	83.29% <87.50%> (+0.04%)	⬆️
pkg/runtime/rule/evaluator.go	22.17% <100.00%> (+0.16%)	⬆️
... and 4 more

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