refactor: minimize amount of vimscript (#96)

* refactor: remove autoload

* since nvim 0.9 health.lua files are threaded as checkhealth provider

*  prof of concept 

* fix(runner.gocmd)!: i forgot to update it when i was working on #85

* fix(plugin): now commands register properly

* fix(plugin): fix command name for :GoIfErr

* fix(plugin): respect `setup_commands` option

* docs: update

* refactor(plugin): use vim.schedule

* docs: update CONTRIBUTING

Taskfile.yml

@@ -1,26 +1,16 @@
 version: "3"
 tasks:
-  format:
-    desc: formats all lua files in repo
-    cmds:
-      - stylua .
-
   lint:
     desc: runs all linters
     cmds:
       - task: selene
-      - task: stylua:check
+      - stylua --check .
 
   selene:
     desc: runs lua linter(selene)
     cmds:
       - selene .
 
-  stylua:check:
-    desc: runs stylua in check mode
-    cmds:
-      - stylua --check .
-
   stylua:
     desc: runs lua formatter
     cmds: