🎙️ task - feat(kitty): add ctrl+a keybinding for select all

[caseybrookes]

🦫🎙️ dispatch to foreman

💧 task enqueued
   ├─ priority = ?
   ├─ yieldage = ?
   └─ leverage = ?

title
feat(kitty): add ctrl+a keybinding for select all
description
add a kitty keybinding that maps control+a to select all.

what

bind ctrl+a to the select-all action in kitty terminal config.

why

quality-of-life: ctrl+a is the conventional select-all shortcut; wire it up in kitty so it matches muscle memory.

acceptance

• pressing ctrl+a in kitty selects all text in the current window/scrollback
• keybinding lives in the kitty config managed by this repo