feat: Move Cargo.toml to root

[liurenjie1024]

What's changed and what's your intention?

RT.

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)

Closes #1572

[codecov]

Codecov Report

Merging #1580 (b6e7537) into main (0f2d391) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main    #1580      +/-   ##
============================================
- Coverage     69.70%   69.70%   -0.01%     
  Complexity     2766     2766              
============================================
  Files          1042     1042              
  Lines         91601    91601              
  Branches       1790     1790              
============================================
- Hits          63852    63850       -2     
- Misses        26858    26860       +2     
  Partials        891      891              

Flag	Coverage Δ
java	61.01% <ø> (ø)
rust	71.52% <ø> (-0.01%)	⬇️

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Impacted Files	Coverage Δ
src/connector/src/filesystem/file_common.rs	80.26% <0.00%> (-0.45%)	⬇️
src/common/src/types/ordered_float.rs	23.50% <0.00%> (-0.20%)	⬇️

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[skyzh]

Approve as long as it pass CI