Add Emacs config with Zed-matching Synthwave84 Soft theme

[DROOdotFOO]

Adds a chezmoi-managed Emacs config with a theme that matches Zed exactly.

Vanilla Emacs 30 (emacs-plus@30) at ~/.config/emacs: use-package +
package.el, the vertico/corfu completion stack, magit, and eglot +
tree-sitter for Elixir, Rust, TS, Go, Python, Lua, Nix, and Solidity.
New frames open on a dashboard rather than an empty *scratch*.

Theme

Zed and Ghostty were already on different Synthwave84 variants. Rather than
force one, this mirrors the split the Zed theme itself makes:

• UI and syntax come from a new [data.theme.soft] block -- the
  Synthwave84 Soft variant Zed uses. It also carries the syntax roles
  (keyword, string, function, type, ...) that [data.theme] lacks.
• ANSI faces reuse the base [data.theme] keys, so shell buffers inside
  Emacs still match Ghostty.

[data.theme] is untouched, so no existing template changes behavior.

Verified against a live GUI frame: Monaspace Neon, bg #2e2a3e,
keyword #fee380, string #ffa15a, function #5af5f3, type #ff92e0 --
identical to the shipped Zed theme.

Notable findings

~/.emacs.d silently shadows XDG. startup--xdg-or-homedot
(startup.el:506-524) returns ~/.emacs.d whenever that directory merely
exists -- it never checks for an init.el. The stale native-comp cache
there would have disabled this entire config. setup-emacs.sh and
make doctor now guard against it reappearing.

mise shims were invisible to the daemon. ruff and rust-analyzer are
mise shims, and mise activates from .zshrc, which the daemon's login shell
never sources; rust-analyzer only appeared to work via a separate cargo
copy. The shims directory is now added to exec-path explicitly.

config/theme/synthwave84.toml had drifted from the shipped Zed theme on
keyword (#ff7edb -> #fede5d) and type (#72f1b8 -> #ff7edb).
Corrected.

Design notes

• eglot only hooks a mode when its server binary is on PATH, so missing
  servers degrade to a plain major mode instead of erroring. Only
  rust-analyzer and lua-language-server are installed here; the other
  languages open in tree-sitter modes with no LSP.
• All runtime state (elpa, eln-cache, grammars, custom.el) is redirected
  to XDG dirs, keeping the chezmoi-managed tree free of drift -- so no
  home/.chezmoiignore was needed.
• The classic startup screen only renders during true startup, so under a
  daemon emacsclient frames never see it. initial-buffer-choice points at
  a freshly refreshed dashboard, which is consulted per frame.

Manual testing

• chezmoi apply deploys 10 files; chezmoi verify ~/.config/emacs clean
• emacs --batch --eval '(princ user-emacs-directory)' -> ~/.config/emacs/
• Daemon loads all six lisp/ modules; custom-enabled-themes is (synthwave84-soft)
• Live GUI frame reports the exact Soft palette hexes and Monaspace Neon
• 18 tree-sitter grammars compile; .ex/.rs/.go/.lua/.py/.ts/.nix/.yaml all open in their -ts-mode
• eglot hooks rust-ts-mode and python-ts-mode; opening a Go file with no gopls yields no error
• New client frame opens *dashboard* in dashboard-mode
• make lint, pre-commit, and the CI template gate (every .tmpl rendered against a CI-rendered config) all pass
• make doctor: 40 passed, 0 failed
• Theme byte-compiles with byte-compile-error-on-warn t

Note: the Brewfile change marks run_onchange_after_brew-bundle.sh pending, so
a full chezmoi apply will run brew bundle install.

🤖 Generated with Claude Code