Add configurable API rate limits with subtabs in settings (v0.10.0)

- Make rate limiting configurable via WordPress options
- Add subtabs to API settings: General, Rate Limits, Endpoints
- Add HTTP method badges for endpoint documentation
- Update CHANGELOG with rate limiting configuration details

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

assets/css/admin.css

@@ -491,6 +491,37 @@
 	height: 16px;
 }
 
+/* API Method Badges */
+.wp-bnb-method {
+	display: inline-block;
+	padding: 2px 8px;
+	border-radius: 3px;
+	font-size: 11px;
+	font-weight: 600;
+	text-transform: uppercase;
+	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
+}
+
+.wp-bnb-method.get {
+	background: #e7f5e7;
+	color: #1e7e1e;
+}
+
+.wp-bnb-method.post {
+	background: #e7f0f5;
+	color: #1e5f7e;
+}
+
+.wp-bnb-method.patch {
+	background: #f5f0e7;
+	color: #7e5f1e;
+}
+
+.wp-bnb-method.delete {
+	background: #f5e7e7;
+	color: #7e1e1e;
+}
+
 /* Form Tables */
 .form-table th {
 	width: 200px;