Move Session, Page and Renderer into their own respective files

src/browser/dom/document_fragment.zig

@@ -16,8 +16,6 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-const std = @import("std");
-
 const parser = @import("../netsurf.zig");
 const SessionState = @import("../env.zig").SessionState;
 

src/browser/dom/intersection_observer.zig

@@ -17,14 +17,12 @@
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 const std = @import("std");
-const Allocator = std.mem.Allocator;
 
 const parser = @import("../netsurf.zig");
 const SessionState = @import("../env.zig").SessionState;
 
 const Env = @import("../env.zig").Env;
 const Element = @import("element.zig").Element;
-const Document = @import("document.zig").Document;
 
 pub const Interfaces = .{
     IntersectionObserver,

src/browser/dom/namednodemap.zig

@@ -16,8 +16,6 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-const std = @import("std");
-
 const parser = @import("../netsurf.zig");
 
 const DOMException = @import("exceptions.zig").DOMException;

src/browser/env.zig

@@ -5,9 +5,9 @@ const URL = @import("../url.zig").URL;
 const js = @import("../runtime/js.zig");
 const storage = @import("storage/storage.zig");
 const generate = @import("../runtime/generate.zig");
+const Renderer = @import("renderer.zig").Renderer;
 const Loop = @import("../runtime/loop.zig").Loop;
 const HttpClient = @import("../http/client.zig").Client;
-const Renderer = @import("browser.zig").Renderer;
 
 const WebApis = struct {
     // Wrapped like this for debug ergonomics.