refactor: nest Ruby LSP actions under core.lsp

src/ruby_host.rb

@@ -64,11 +64,22 @@ module Vamp
       copy_system paste_system_before paste_system_after
       select_lines clone_above clone_below select_next skip_occurrence select_all
       file_picker file_explorer
-      lsp_definition lsp_diagnostics lsp_hover
     ].each do |name|
       action = Action.new("core.#{name}".freeze).freeze
       define_singleton_method(name) { action }
     end
+
+    module Lsp
+      %w[definition diagnostics hover].each do |name|
+        action = Action.new("core.lsp_#{name}".freeze).freeze
+        define_singleton_method(name) { action }
+      end
+    end
+    Lsp.freeze
+
+    def self.lsp
+      Lsp
+    end
   end
 
   module Modes