Feat: Create Merge Request (#149)

- Adds the ability to create MRs to the plugin
- Adds the ability to jump to specific discussions/notes in the browser
- Fixes stale icons
- Adds debug keybinding for discussion tree for developers

lua/gitlab/actions/discussions/signs.lua

@@ -11,7 +11,7 @@ local M = {}
 M.diagnostics_namespace = diagnostics_namespace
 
 ---Clear all signs and diagnostics
-M.clear_signs_and_discussions = function()
+M.clear_signs_and_diagnostics = function()
   vim.fn.sign_unplace(discussion_sign_name)
   vim.diagnostic.reset(diagnostics_namespace)
 end