feat: support binding functions and unary exprs

[neverchanje]

What's changed and what's your intention?

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)

#338

[codecov]

Codecov Report

Merging #694 (23e1fa6) into main (c7b006a) will decrease coverage by 0.00%.
The diff coverage is 67.01%.

@@             Coverage Diff              @@
##               main     #694      +/-   ##
============================================
- Coverage     71.55%   71.55%   -0.01%     
  Complexity     2706     2706              
============================================
  Files           900      901       +1     
  Lines         51943    52018      +75     
  Branches       1781     1781              
============================================
+ Hits          37170    37219      +49     
- Misses        13958    13984      +26     
  Partials        815      815              

Flag	Coverage Δ
java	58.86% <ø> (ø)
rust	77.04% <67.01%> (-0.03%)	⬇️

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

Impacted Files	Coverage Δ
rust/common/src/error.rs	67.88% <0.00%> (ø)
rust/common/src/vector_op/cast.rs	6.66% <0.00%> (ø)
rust/frontend/src/binder/bind_context.rs	100.00% <ø> (ø)
rust/frontend/src/binder/mod.rs	100.00% <ø> (ø)
rust/frontend/src/expr/agg_call.rs	0.00% <0.00%> (ø)
rust/common/src/vector_op/substr.rs	84.61% <33.33%> (-5.13%)	⬇️
rust/frontend/tests/plan_test_runner.rs	72.88% <50.00%> (+0.95%)	⬆️
rust/frontend/src/binder/expr/mod.rs	65.95% <63.15%> (-11.83%)	⬇️
rust/frontend/src/binder/expr/function.rs	85.71% <85.71%> (ø)
rust/frontend/src/binder/expr/value.rs	90.69% <100.00%> (+0.69%)	⬆️
... and 6 more

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