feat(snippets): add universal <cj marker snippet

New `snippets/fundamental-mode/cj-comment-block` expands `<cj` + TAB to the literal three-line marker block:

    #+begin_src cj: comment
    <cursor>
    #+end_src

It lives in `fundamental-mode/` so yas's parent-chain lookup finds it in every buffer, plus the activation hook from the previous commit explicitly turns on `fundamental-mode` as an extra mode in every buffer — so even modes that don't descend from `fundamental-mode` (like `special-mode`-derived buffers) pick it up.

The marker is what my Python scanner skill picks out across files. Now I can plant it in any buffer, not just org where the old org-tempo entry lived.

0 files changed, 0 insertions, 0 deletions