feat: enhance rate limit error

* Don't tell authenticated users to log in.
* Tell users when the rate limit expires.

lib/remote-template.js

@@ -197,21 +197,31 @@ ${error.message}`
   }
 }
 
-/** @type {ErrorMessageInfo} */
-const rateLimitErrorMessage = {
-  title: 'GITHUB RATE LIMIT EXCEEDED',
-  message: `It looks like you exceeded the GitHub rate limit by using "--template" too many
-times, this will likely last for 30 minutes.
-
+/**
+ * @param {boolean} hasPat
+ * @param {string} resetTime
+ * @returns {ErrorMessageInfo}
+ */
+function rateLimitErrorMessage(hasPat, resetTime) {
+  return {
+    title: 'GITHUB RATE LIMIT EXCEEDED',
+    message: `It looks like you exceeded the GitHub rate limit by using "--template" too many
+times, this will likely last until ${resetTime}.
+${
+  hasPat
+    ? ''
+    : `
 In the meantime, you can use \`--github-auth=your-api-token\`.
-Follow this guide: https://docs.github.com/en/github/authenticating-to-github/creating-a-personal-access-token to create an API token, and give it access to public repositories.
+Follow this guide: https://docs.github.com/en/github/authenticating-to-github/creating-a-personal-access-token to create an API token, and give it access to public repositories.`
+}
 
 To avoid this problem and to make the review process faster, consider setting up
 elm-review in your project:
 
     elm-review init
     elm-review init --template <some-configuration>`
-};
+  };
+}
 
 /**
  * @param {string} repoName
@@ -380,11 +390,14 @@ async function makeGitHubApiRequest(options, url, handleNotFound) {
     Debug.log(`# body:\n${JSON.stringify(error.response.body, null, 4)}`);
     if (error.name === 'HTTPError') {
       switch (error.response.statusCode) {
+        case 429:
         case 403: {
-          throw new ErrorMessage.CustomError(
-            rateLimitErrorMessage.title,
-            rateLimitErrorMessage.message
-          );
+          const hasPat = options.gitHubPat !== undefined;
+          const rateLimitReset = error.response.headers['x-ratelimit-reset'];
+          const resetTime = new Date(rateLimitReset * 1000).toLocaleString();
+          const {title, message} = rateLimitErrorMessage(hasPat, resetTime);
+
+          throw new ErrorMessage.CustomError(title, message);
         }
 
         case 404: