feat(defaults): map "grx" to vim.lsp.codelens.run() #37689

Problem
Unlike inlay hints, code lenses are closely related to running commands;
a significant number of code lenses are used to execute a command (such
as running tests). Therefore, it is necessary to provide a default
mapping for them.

Solution
Add a new default mapping "grx" (mnemonic: "eXecute", like "gx").

runtime/lua/vim/_core/defaults.lua

@@ -209,6 +209,10 @@ do
       vim.lsp.buf.code_action()
     end, { desc = 'vim.lsp.buf.code_action()' })
 
+    vim.keymap.set('n', 'grx', function()
+      vim.lsp.codelens.run()
+    end, { desc = 'vim.lsp.codelens.run()' })
+
     vim.keymap.set('n', 'grr', function()
       vim.lsp.buf.references()
     end, { desc = 'vim.lsp.buf.references()' })