chore(lang): Tweak company and whitespace options for golang

Setting company-echo-delay to 0.5 instead of 0 will help reduce unneeded
and intrusive code-completion popups while in the middle of typing. It
seemed like a good idea when I first set it, but after some use, no
thanks.

The whitespace-style tweak, effectively removes "indentation" from the
list of items whitespace-cleanup deals with on save. Indentation is
already being fixed by lsp-mode's before-save hooks, and
whitespace-cleanup was not very intelligent about it. It specifically
replaced all instances of four consecutive spaces in raw string
literals with a tab, which caused issues with multi-line raw strings
containing JSON.

modules/languages/siren-golang.el

@@ -31,8 +31,9 @@
 
   (defun siren-go-mode-setup ()
     (setq-local tab-width 4
-                company-echo-delay 0
-                company-minimum-prefix-length 1)
+                company-echo-delay 0.5
+                company-minimum-prefix-length 1
+                whitespace-style (delete 'indentation whitespace-style))
 
     (add-hook 'before-save-hook #'lsp-format-buffer t t)
     (add-hook 'before-save-hook #'lsp-organize-imports t t)