Switch gem RBI regeneration to RubyGems plugin

lib/ruby_lsp/tapioca/addon.rb

@@ -53,7 +53,7 @@ def activate(global_state, outgoing_queue)
           )
 
           send_usage_telemetry("activated")
-          run_gem_rbi_check
+          # run_gem_rbi_check
         rescue IncompatibleApiError
           send_usage_telemetry("incompatible_api_error")
 

lib/rubygems_plugin.rb

@@ -0,0 +1,41 @@
+# typed: true
+# frozen_string_literal: true
+
+# If we're not running a bundler command, skip registering the plugin
+return unless $PROGRAM_NAME.end_with?("bundle", "bundler")
+
+# If the command is not update or lock, skip registering the plugin
+return unless ["update", "lock"].include?(ARGV.first)
+
+# Use a RubyGems plugin to run gem RBI synchronization when gems are updated
+# This file gets required before actually installing gems, which gives us a chance to compare the lockfile and know
+# if gems have actually changed
+
+# We use this global variable to ensure that the plugin is only registered once since RubyGems / Bundler will actually
+# load this multiple times
+# rubocop:disable Style/GlobalVars
+return if $registered_tapioca_rubygems_plugin
+
+$registered_tapioca_rubygems_plugin = true
+# rubocop:enable Style/GlobalVars
+
+lockfile = begin
+  Bundler.default_lockfile
+rescue Bundler::GemfileNotFound
+  nil
+end
+return unless lockfile
+
+# Get the state of the lockfile before any changes are committed
+current_lockfile = File.read(lockfile)
+
+# This is a RubyGems and not a Bundler plugin, so it would get invoked multiple times during a bundle update. We workaround
+# that by registering an at_exit hook to generate the RBIs once Bundler is fully done
+at_exit do
+  new_lockfile = File.read(lockfile)
+
+  if current_lockfile != new_lockfile
+    puts "Detected gem updates, regenerating gem RBIs"
+    system("bundle exec tapioca gem")
+  end
+end