chore: release v0.3.1

[github-actions]

🤖 New release

• ratzilla: 0.3.0 -> 0.3.1

Changelog

0.3.1 - 2026-04-19

🚀 Features

• (backend) Add CellSized trait for querying cell dimensions in physical and CSS pixels by @junkdog in #165
• (webgl2) Add cell_size() and set_size() to WebGl2Backend by @junkdog in #164
• (mouse) Enhance mouse events with grid coordinates by @junkdog in #157
• (webgl2) Update to beamterm 0.15.0 and add disable_auto_css_resize option by @junkdog in #155
• Update beamterm to 0.13.0 and add option for using dynamic_font_atlas by @0xferrous in #144

🐛 Bug Fixes

• (template) Use liquid extension to allow as using as git dependency by @atollk in #176
• (dom) Measure terminal cell size by @junkdog in #159

📚 Documentation

• (readme) Update the link to trunk's landing page by @orhun in #173
• (readme) Add kana learning tool website by @benoitlx in #158
• (backends) Update backend comparison and feature matrix by @junkdog in #153

⚙️ Miscellaneous Tasks

• (template) Bump the dependencies for simple template by @orhun in #177
• (deps) Bump beamterm to 0.17.0 by @junkdog in #166

Full Changelog: 0.3.0...0.3.1

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