eliminate any_key dependency

[ccbrown]

What It Does

This replaces the any_key dependency with a simple in-crate replacement. The motivation is to eliminate two unmaintained dependencies, one with a known soundness issue.

Related Issues

Fixes #153

[codecov]

Codecov Report

❌ Patch coverage is 83.33333% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.97%. Comparing base (26a2f79) to head (b770cc5).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/iocraft/src/any_key.rs	83.33%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #154      +/-   ##
==========================================
- Coverage   89.99%   89.97%   -0.03%     
==========================================
  Files          31       32       +1     
  Lines        5198     5216      +18     
  Branches     5198     5216      +18     
==========================================
+ Hits         4678     4693      +15     
- Misses        419      422       +3     
  Partials      101      101              

Files with missing lines	Coverage Δ
packages/iocraft/src/element.rs	79.24% <ø> (ø)
packages/iocraft/src/any_key.rs	83.33% <83.33%> (ø)

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