Emit Log.addEntry

Currently, this hooks a single log.Interceptor into the logging framework, but
changing it to take a list shouldn't be too hard. Biggest issue is who will own
it, as we'd need an allocator to maintain a list / lookup (which log doesn't
currently have).

Uses logFmt format, and, for now, always filters out debug messages and a few
particularly verbose scopes.

src/cdp/cdp.zig

@@ -30,6 +30,7 @@ const Session = @import("../browser/session.zig").Session;
 const Page = @import("../browser/page.zig").Page;
 const Incrementing = @import("../id.zig").Incrementing;
 const Notification = @import("../notification.zig").Notification;
+const LogInterceptor = @import("domains/log.zig").LogInterceptor;
 const InterceptState = @import("domains/fetch.zig").InterceptState;
 
 pub const URL_BASE = "chrome://newtab/";
@@ -338,6 +339,8 @@ pub fn BrowserContext(comptime CDP_T: type) type {
 
         intercept_state: InterceptState,
 
+        log_interceptor: LogInterceptor(Self),
+
         // When network is enabled, we'll capture the transfer.id -> body
         // This is awfully memory intensive, but our underlying http client and
         // its users (script manager and page) correctly do not hold the body
@@ -378,6 +381,7 @@ pub fn BrowserContext(comptime CDP_T: type) type {
                 .notification_arena = cdp.notification_arena.allocator(),
                 .intercept_state = try InterceptState.init(allocator),
                 .captured_responses = .empty,
+                .log_interceptor = LogInterceptor(Self).init(allocator, self),
             };
             self.node_search_list = Node.Search.List.init(allocator, &self.node_registry);
             errdefer self.deinit();
@@ -389,6 +393,10 @@ pub fn BrowserContext(comptime CDP_T: type) type {
         }
 
         pub fn deinit(self: *Self) void {
+            // safe to call even if never registered
+            log.unregisterInterceptor();
+            self.log_interceptor.deinit();
+
             self.inspector.deinit();
 
             // abort all intercepted requests before closing the sesion/page
@@ -496,6 +504,18 @@ pub fn BrowserContext(comptime CDP_T: type) type {
             self.cdp.browser.notification.unregister(.page_network_almost_idle, self);
         }
 
+        pub fn logEnable(self: *Self) void {
+            log.registerInterceptor(.{
+                .ctx = &self.log_interceptor,
+                .done = LogInterceptor(Self).done,
+                .writer = LogInterceptor(Self).writer,
+            });
+        }
+
+        pub fn logDisable(_: *const Self) void {
+            log.unregisterInterceptor();
+        }
+
         pub fn onPageRemove(ctx: *anyopaque, _: Notification.PageRemove) !void {
             const self: *Self = @ptrCast(@alignCast(ctx));
             try @import("domains/page.zig").pageRemove(self);