Support dict unpacking with conditional expression

[gordonwatts]

Summary

• handle **dict expansion in syntatic_sugar.resolve_syntatic_sugar
• allow conditional dictionary unpacking by converting to IfExp
• test unpacking and conditional expansions
• Updated the agents file to include black and flake8
• Make sure nested expansions work properly

Fixes #193

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https://chatgpt.com/codex/tasks/task_e_686871ce28888320aae6af67d4f2adf4

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 92.30769% with 2 lines in your changes missing coverage. Please review.

Project coverage is 97.39%. Comparing base (2606c3c) to head (f67a611).

Files with missing lines	Patch %	Lines
func_adl/ast/syntatic_sugar.py	92.30%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #199      +/-   ##
==========================================
- Coverage   97.48%   97.39%   -0.10%     
==========================================
  Files          15       15              
  Lines        1433     1459      +26     
==========================================
+ Hits         1397     1421      +24     
- Misses         36       38       +2     

Flag	Coverage Δ
unittests	97.39% <92.30%> (-0.10%)	⬇️

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