Add report.rbs

Steepfile

@@ -4,5 +4,6 @@ target :lib do
   signature "sig"
 
   check "lib/lrama/bitmap.rb"
+  check "lib/lrama/report.rb"
   check "lib/lrama/warning.rb"
 end

sig/lrama/report.rbs

@@ -0,0 +1,15 @@
+module Lrama
+  class Report
+    module Profile
+      def self.report_profile: { -> void } -> StackProf::result
+    end
+
+    module Duration
+      self.@_report_duration_enabled: bool | nil
+
+      def self.enable: -> void
+      def self.enabled?: -> bool
+      def report_duration: [T] (_ToS method_name) { -> T } -> T
+    end
+  end
+end