feat(lsp): add triggerKind option for vim.lsp.buf.code_action (#21905)

runtime/lua/vim/lsp/protocol.lua

@@ -304,6 +304,17 @@ local constants = {
     -- Base kind for an organize imports source action
     SourceOrganizeImports = 'source.organizeImports',
   },
+  -- The reason why code actions were requested.
+  ---@enum lsp.CodeActionTriggerKind
+  CodeActionTriggerKind = {
+    -- Code actions were explicitly requested by the user or by an extension.
+    Invoked = 1,
+    -- Code actions were requested automatically.
+    --
+    -- This typically happens when current selection in a file changes, but can
+    -- also be triggered when file content changes.
+    Automatic = 2,
+  },
 }
 
 for k, v in pairs(constants) do