add CI pipeline with lint, test, build

node_modules/eslint/messages/rule-unsupported-language.js

@@ -0,0 +1,18 @@
+"use strict";
+
+module.exports = function ({ ruleIds, language }) {
+	return `
+The following rules do not support the language "${language}":
+${ruleIds.map(id => `\t- "${id}"`).join("\n")}
+
+To fix this error, either:
+- Remove the rule from your configuration, or set its severity to "off".
+- Use the "files" option to apply the rule only to files of the supported language, for example:
+  {
+    files: ["**/*.js"],
+    rules: { "${ruleIds[0]}": "error" }
+  }
+
+See https://eslint.org/docs/latest/use/configure/rules for more information.
+`.trimStart();
+};