ci: add test workflow and fix code quality issues

- Add CI test job with Emacs batch load and byte-compile
- Fix settings-file variable check in init.el
- Fix extra parenthesis in init-neotree.el
- Add missing projectile dependencies in neotree and web-mode
- Fix add-hook usage in init-icons.el
- Add hydra dependency in init-ivy.el
- Standardize header style in init-company.el

modules/init-web-mode.el

@@ -4,6 +4,7 @@
 
 ;;; Code:
 (use-package web-mode
+  :after projectile
   :pin "MELPA"
   :mode (("\\.html?\\'"     . web-mode)
          ("\\.djhtml\\'"    . web-mode)