Add build trigger for validation-tools

GitOrigin-RevId: 04299d9ab23c65aa791acecd1c0e63b70df9a8d1

.editorconfig

@@ -0,0 +1,21 @@
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[Makefile]
+indent_style = tab
+
+[*.go]
+indent_style = tab
+
+[*.{pug,coffee}]
+indent_style = tab
+
+[*.{pug,patch}]
+trim_trailing_whitespace = false