Feat: Simplify, with token becomes where token in match

[JSAbrahams]

Summary

With did almost the same, lets simplify the language. This makes more clear that 'do' is for imperative, and where is for those places where the order does not matter.

Added Tests

Tests update to reflect the change.

[codecov]

Codecov Report

❌ Patch coverage is 93.54839% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 92.50%. Comparing base (8155000) to head (c5dff29).

Files with missing lines	Patch %	Lines
src/backend/python/convert/mod.rs	87.50%	1 Missing ⚠️
src/parse/ast/node.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #495   +/-   ##
========================================
  Coverage    92.50%   92.50%           
========================================
  Files          113      113           
  Lines        15709    15709           
========================================
  Hits         14531    14531           
  Misses        1178     1178           

Files with missing lines	Coverage Δ
src/check/ast/mod.rs	100.00% <ø> (ø)
src/check/ast/node.rs	99.16% <ø> (ø)
src/check/constrain/generate/mod.rs	93.84% <100.00%> (ø)
src/check/constrain/generate/resources.rs	96.55% <100.00%> (ø)
src/parse/ast/mod.rs	85.29% <ø> (ø)
src/parse/control_flow_expr.rs	93.12% <100.00%> (ø)
src/parse/lex/token.rs	85.62% <100.00%> (ø)
src/parse/lex/tokenize.rs	98.80% <100.00%> (ø)
src/parse/statement.rs	94.92% <100.00%> (ø)
src/backend/python/convert/mod.rs	95.47% <87.50%> (ø)
... and 1 more

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