fix(mailgun): Normalize package scope and modernize Mailgun client: rename package to @apiclient.xyz/mailgun, update dependencies, refactor HTTP handling, fix types, update TS config and CI, refresh docs and tests

.gitignore

@@ -3,7 +3,6 @@
 # artifacts
 coverage/
 public/
-pages/
 
 # installs
 node_modules/
@@ -17,4 +16,8 @@ node_modules/
 dist/
 dist_*/
 
-# custom
+# AI
+.claude/
+.serena/
+
+#------# custom