docs: improve GitHub token setup messaging with config file path and env var alternatives

Author: wbbradley

src/github.rs

@@ -872,6 +872,14 @@ pub fn setup_github_token_interactive() -> Result<String> {
     println!("3. Scopes needed: repo (full control of private repos)");
     println!("4. Click \"Generate token\" and copy the value");
     println!();
+    println!("Alternatively, set GITHUB_TOKEN or GH_TOKEN in your environment,");
+    println!("or manually create the config file with:");
+    if let Ok(config_path) = get_github_config_path() {
+        println!("  {}", config_path.display());
+    }
+    println!("Contents:");
+    println!("  default_token: ghp_yourtoken");
+    println!();
     print!("Enter your token: ");
     io::stdout().flush()?;
 

src/main.rs

@@ -1348,7 +1348,7 @@ fn handle_pr_command(
 
     // Ensure we have auth configured
     if !has_github_token(&repo_id.host) {
-        println!("{}", "GitHub authentication required.".yellow());
+        println!("{}", "GitHub authentication required (needs a Personal Access Token with the 'repo' scope).".yellow());
         setup_github_token_interactive()?;
     }