Shell QoL, REPO path refactor, and WSL clipboard image tooling

[Unique-Divine]

Shell QoL, REPO path refactor, and WSL clipboard image tooling

Aligns dotfiles with a $REPO-rooted workspace layout ($HOME/ki), adds safer
deletion and epics navigation, introduces a Windows-clipboard image paste helper
for WSL, and vendors GitHub Markdown CSS for local Pandoc previews.

Key Changes

1. Replace BOKU_PATH with REPO ($HOME/ki) in zshenv, shell helpers, and
   skillsSync, resolving the boku tree as $REPO/boku. This matches how the
   workspace is organized on disk and keeps sibling repos addressable from one
   root.
2. Add pbpaste-img (bin/pbpaste-img + bin/pbpaste-img.ps1) to save the
   current Windows clipboard bitmap to ~/.local/pbpaste-img/YY-MM/ and copy the
   saved path back to the clipboard, with WSL vs native Windows path handling.
3. Safer shell defaults: alias rm to trash -v and install trash-cli via
   just i-bash (along with ca-certificates, gnupg, and curl).
4. Shell helper updates: add epics() to open the epics tree in Neovim, fix
   vvjq to pipe through view -, remove unused rt alias, and normalize quote
   style in aliases.sh.
5. Vendor css/github-markdown.min.css (cdnjs 5.8.1) plus a small Pandoc override
   for .markdown-body layout, documented in css/README.md.
6. Append Codex installer's $HOME/.local/bin to PATH in zshrc.

Appendix

• skillsSync tests now set REPO to a parent directory and place the boku
  tree at $REPO/boku, mirroring production layout.
• pbpaste-img requires powershell.exe and wslpath; output directory is
  overridable via PBPASTE_IMG_DIR.

---

Note

Medium Risk
The REPO/BOKU_PATH rename breaks any external scripts still expecting BOKU_PATH, and aliasing rm to trash changes delete behavior machine-wide for interactive shells.

Overview
Replaces BOKU_PATH with REPO ($HOME/ki) and derives dotfiles/notes paths as $REPO/boku/... in zshenv, quick.sh, skillsSync.ts, and tests.

Adds pbpaste-img (bash + PowerShell): reads a bitmap from the Windows clipboard, saves a timestamped PNG under ~/.local/pbpaste-img (month subdirs), and puts the saved path back on the clipboard (WSL path when is_wsl).

Vendors GitHub Markdown CSS plus a small Pandoc layout override for local HTML previews; documents usage in css/README.md.

Shell tweaks: rm → trash -v, new epics helper, just i-bash pulls in trash-cli and related packages, duplicate Codex ~/.local/bin PATH in zshrc, and minor alias/formatting cleanup.

^{Reviewed by Cursor Bugbot for commit 16bf1d2. Configure here.}