Add .irbrc to customise IRB for the project

Author: st0012

.irbrc

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+require "bundler/setup"
+require_relative "lib/ruby_lsp/internal"
+
+IRB.conf[:IRB_NAME] = IRB::Color.colorize("ruby-lsp", [:BLUE, :BOLD])
+IRB.conf[:HISTORY_FILE] = "~/.irb_history"