Add Network.setBlockedURLs support (#315)

Added Network.setBlockedURLs dispatch handling.
Stores blocked URL patterns on each page.
Applies blocking to page subresources and JS fetch / XHR requests.
Supports wildcard CDP-style patterns like *://*.gstatic.com/*.woff2.

crates/obscura-cdp/src/dispatch.rs

@@ -233,7 +233,8 @@ fn is_v8_free_method(method: &str) -> bool {
         | "Runtime.runIfWaitingForDebugger" | "Runtime.getExceptionDetails"
         | "Runtime.discardConsoleEntries"
         | "Network.enable" | "Network.disable" | "Network.setCacheDisabled"
-        | "Network.setRequestInterception" | "Network.setExtraHTTPHeaders"
+        | "Network.setRequestInterception" | "Network.setBlockedURLs"
+        | "Network.setExtraHTTPHeaders"
         | "Network.setUserAgentOverride"
         | "Network.getCookies" | "Network.getAllCookies"
         | "Network.setCookie" | "Network.setCookies"