SKIP_LABELS is too aggresive

[ze2j]

TauPlot version

v0.1.0

Godot version

Godot 4.5+

Issue description

The SKIP_LABELS overlap strategy (used in both continuous and categorical axes) uses an integer modulo approach that jumps between densities too aggressively. It often skips to "every 3rd label" when "every 2nd label" would already fit.

See test 2 in tests/axis/label_overlapping/test_label_overlap_x_categorical.gd

Minimal reproduction project (MRP)

No response