v1.9.0

Summary

• Introduces a new `presets` config option and scaffolds `tailwind.config.js` with future flags commented out.
• Adds numerous utilities such as full row/col spans, configurable outlines, extra rotate/skew values, larger border‑radius sizes, and grid auto‑column/row utilities, plus an experimental 2xl breakpoint and dark‑mode variant disabling.
• Promotes experimental line‑height and font‑weight settings to future, improves accessibility defaults, fixes keyframe escaping and IE11 word‑wrap handling.