💥 Remove :feature category

:feature was a "catch-all" category. Many of its modules fit better in
other categories, so they've been moved:

- feature/debugger -> tools/debugger
- feature/evil -> editor/evil
- feature/eval -> tools/eval
- feature/lookup -> tools/lookup
- feature/snippets -> editor/snippets
- feature/file-templates -> editor/file-templates
- feature/workspaces -> ui/workspaces

More potential changes in the future:

- A new :term category for terminal emulation modules (eshell, term and
  vterm).
- A new :os category for modules dedicated to os-specific functionality.
  The :tools macos module would fit here, but so would modules for nixos
  and arch.
- A new :services category for web-service integration, like wakatime,
  twitter, elfeed, gist and pastebin services.

modules/editor/snippets/config.el

@@ -0,0 +1,59 @@
+;;; editor/snippets/config.el -*- lexical-binding: t; -*-
+
+(defvar +snippets-dir (expand-file-name "snippets/" doom-private-dir)
+  "Directory where `yasnippet' will search for your private snippets.")
+
+
+;;
+;; Packages
+
+(def-package! yasnippet
+  :commands (yas-minor-mode-on yas-expand yas-expand-snippet yas-lookup-snippet
+             yas-insert-snippet yas-new-snippet yas-visit-snippet-file)
+  :init
+  ;; Ensure `yas-reload-all' is called as late as possible. Other modules could
+  ;; have additional configuration for yasnippet. For example, file-templates.
+  (add-transient-hook! 'yas-minor-mode-hook (yas-reload-all))
+
+  (add-hook! (text-mode prog-mode conf-mode snippet-mode)
+    #'yas-minor-mode-on)
+
+  :config
+  (setq yas-verbosity (if doom-debug-mode 3 0)
+        yas-also-auto-indent-first-line t
+        yas-triggers-in-field t   ; Allow nested snippets
+        ;; Remove default ~/.emacs.d/snippets
+        yas-snippet-dirs (delete yas--default-user-snippets-dir yas-snippet-dirs))
+
+  ;; Allow private snippets in DOOMDIR/snippets
+  (add-to-list 'yas-snippet-dirs '+snippets-dir nil #'eq)
+
+  ;; Remove GUI dropdown prompt (prefer ivy/helm)
+  (setq yas-prompt-functions (delq 'yas-dropdown-prompt yas-prompt-functions))
+  ;; Prioritize private snippets in `+snippets-dir' over built-in ones if there
+  ;; are multiple choices.
+  (add-to-list 'yas-prompt-functions #'+snippets-prompt-private nil #'eq)
+
+  ;; Register `def-project-mode!' modes with yasnippet. This enables project
+  ;; specific snippet libraries (e.g. for Laravel, React or Jekyll projects).
+  (add-hook 'doom-project-hook #'+snippets|enable-project-modes)
+
+  ;; Exit snippets on ESC from normal mode
+  (add-hook 'doom-escape-hook #'yas-abort-snippet)
+
+  (after! smartparens
+    ;; tell smartparens overlays not to interfere with yasnippet keybinds
+    (advice-add #'yas-expand :before #'sp-remove-active-pair-overlay))
+
+  (when (featurep! :editor evil)
+    ;; evil visual-mode integration for `yas-insert-snippet'
+    (define-key yas-minor-mode-map [remap yas-insert-snippet] #'+snippets/expand-on-region)))
+
+
+;; `auto-yasnippet'
+(setq aya-persist-snippets-dir (concat doom-etc-dir "auto-snippets/"))
+
+
+;; default snippets library
+(def-package! emacs-snippets
+  :after yasnippet)