Added middleware support to top level and host groups

Sources/HostRouter/HostMiddlewareGroup.swift

@@ -0,0 +1,57 @@
+import Vapor
+
+struct HostMiddlewareGroup: Sendable, TopLevelHostRoutesBuilder {
+    /// Router to cascade to.
+    let root: HostRoutesBuilder
+
+    /// Additional middleware.
+    let middleware: [Middleware]
+
+    /// Creates a new routing group.
+    init(root: HostRoutesBuilder, middleware: [Middleware]) {
+        self.root = root
+        self.middleware = middleware
+    }
+
+    /// Prepend the root to the added route, and pass it up the chain.
+    func add(_ route: HostRoute) {
+        route.route.responder = self.middleware.makeResponder(chainingTo: route.route.responder)
+        root.add(route)
+    }
+}
+
+extension TopLevelHostRoutesBuilder {
+    public func grouped(_ middleware: Middleware...) -> some TopLevelHostRoutesBuilder {
+        HostMiddlewareGroup(root: self, middleware: middleware)
+    }
+
+    public func grouped(_ middleware: [Middleware]) -> some TopLevelHostRoutesBuilder {
+        HostMiddlewareGroup(root: self, middleware: middleware)
+    }
+
+    public func group(_ middleware: Middleware..., configure: (TopLevelHostRoutesBuilder) throws -> ()) rethrows {
+        try configure(HostMiddlewareGroup(root: self, middleware: middleware))
+    }
+
+    public func group(_ middleware: [Middleware], configure: (TopLevelHostRoutesBuilder) throws -> ()) rethrows {
+        try configure(HostMiddlewareGroup(root: self, middleware: middleware))
+    }
+}
+
+extension HostRoutesBuilder {
+    public func grouped(_ middleware: Middleware...) -> some HostRoutesBuilder {
+        HostMiddlewareGroup(root: self, middleware: middleware)
+    }
+
+    public func grouped(_ middleware: [Middleware]) -> some HostRoutesBuilder {
+        HostMiddlewareGroup(root: self, middleware: middleware)
+    }
+
+    public func group(_ middleware: Middleware..., configure: (HostRoutesBuilder) throws -> ()) rethrows {
+        try configure(HostMiddlewareGroup(root: self, middleware: middleware))
+    }
+
+    public func group(_ middleware: [Middleware], configure: (HostRoutesBuilder) throws -> ()) rethrows {
+        try configure(HostMiddlewareGroup(root: self, middleware: middleware))
+    }
+}