Feat: Remove Requirement for Dotfile (#84)

This MR removes the requirement for a dotfile (the dotfile is now optional and will override the configuration provided via environment variables). The requirement for providing a project ID is also eliminated, by parsing the namespace and project name from the SSH or HTTPS remote, and then using that to query Gitlab for a matching project.

lua/gitlab/async.lua

@@ -3,7 +3,6 @@
 local server = require("gitlab.server")
 local job = require("gitlab.job")
 local state = require("gitlab.state")
-local u = require("gitlab.utils")
 
 local M = {}
 
@@ -48,9 +47,11 @@ M.sequence = function(dependencies, cb)
     local handler = async:new()
     handler:init(cb)
 
-    if not state.is_gitlab_project then
-      u.notify("The gitlab.nvim state was not set. Do you have a .gitlab.nvim file configured?", vim.log.levels.ERROR)
-      return
+    -- Sets configuration for plugin, if not already set
+    if not state.initialized then
+      if not state.setPluginConfiguration() then
+        return
+      end
     end
 
     if state.go_server_running then