chore: Bump version to 0.27 for ratatui

[uttarayan21]

• chore: Update flake.nix
• feat: Make 5.0.0-rc.1 release

[codecov]

Codecov Report

Attention: Patch coverage is 96.77419% with 2 lines in your changes missing coverage. Please review.

Project coverage is 19.98%. Comparing base (9f1646e) to head (bdac6f6).

Files	Patch %	Lines
src/parser.rs	96.77%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #45      +/-   ##
==========================================
+ Coverage   18.03%   19.98%   +1.94%     
==========================================
  Files           4        4              
  Lines        2362     2502     +140     
==========================================
+ Hits          426      500      +74     
- Misses       1936     2002      +66     

Flag	Coverage Δ
unittests	19.98% <96.77%> (+1.94%)	⬆️

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