chore: bump version to 0.5.0 + write 0.5.0 changelog

Bumps `;; Version:' header from 0.4.0 to 0.5.0 and AGENTS.md `Current
version' to match (it was still 0.3.0; missed at the 0.4.0 bump).

Per AGENTS.md versioning rules, minor (0.x.0) is the right step for
new features, and 0.5.0 collects:

- Typst inline equation preview (#5)
- Configurable Sixel encoder + per-invocation timeout (refs #4)
- Sixel inside tmux >= 3.4 (refs #2)
- Windows Terminal detection + GIF routing (closes #6)
- Inline mpv video playback on the Kitty backend
- Loud warning when the Sixel backend cannot find an encoder on PATH

Plus assorted fixes (ECH erase + pre-erase, heading folded-line
skip, Sixel parity, text sizing column guard / CPU / preview-mode),
the new `justfile' task runner, and documentation that hard-states
img2sixel as the recommended Sixel encoder.

CHANGELOG.org gets a new top-level section with the full feature
write-ups, bench numbers for the encoder swap, credits to @timfel
(encoder timeout pattern + Windows Terminal patch + ongoing Sixel
collaboration), and a reworded "what comes next" paragraph that
reflects the Sixel-in-tmux side as done while leaving Kitty APC
passthrough on the roadmap.

1 files changed, 1 insertions, 1 deletions

diff --git a/kitty-graphics.el b/kitty-graphics.el
index 430818a..d1514df 100644
--- a/kitty-graphics.el
+++ b/kitty-graphics.el
@@ -3,7 +3,7 @@
 ;; Copyright (C) 2025-2026
 ;;
 ;; Author: cashmere
-;; Version: 0.4.0
+;; Version: 0.5.0
 ;; URL: https://github.com/cashmeredev/kitty-graphics.el
 ;; Keywords: terminals, images, multimedia
 ;; Package-Requires: ((emacs "27.1"))