feat(rect): add is_empty() to simplify some common checks

[joshka]

• refactor(rect): extract Rect to layout/rect.rs
• feat(rect): add is_empty() to simplify some common checks

[codecov]

Codecov Report

Merging #534 (f236773) into main (32e4619) will increase coverage by 0.00%.
The diff coverage is 98.98%.

@@           Coverage Diff           @@
##             main     #534   +/-   ##
=======================================
  Coverage   89.94%   89.95%           
=======================================
  Files          40       41    +1     
  Lines       11337    11346    +9     
=======================================
+ Hits        10197    10206    +9     
  Misses       1140     1140           

Files Changed	Coverage Δ
src/layout.rs	98.25% <ø> (-0.13%)	⬇️
src/layout/rect.rs	98.98% <98.98%> (ø)

[orhun]

LGTM, we should probably note the module changes in the commit description.

[joshka]

LGTM, we should probably note the module changes in the commit description.

There's no public api change (just a developer happiness change). rect is a private module and the Rect type is re-exported under the layout module. I'll note this in the commit.

ratatui/src/layout.rs

Lines 28 to 29 in f236773

	mod rect;
	pub use rect::*;