Fix imports to @solidjs/router, solid-router is an old package (#747)

Author: vincentfretin

src/routes/solid-router/advanced-concepts/lazy-loading.mdx

@@ -9,7 +9,7 @@ In Solid Router, you can lazy load components using the `lazy` function from Sol
 
 ```jsx
 import { lazy } from "solid-js";
-import { Router, Route } from "solid-router";
+import { Router, Route } from "@solidjs/router";
 
 const Home = () => import("./Home");
 const Users = lazy(() => import("./Users"));

src/routes/solid-router/concepts/catch-all.mdx

@@ -9,7 +9,7 @@ To create a catch-all route, place a route with a asteriks `*` as the path at th
 Optionally, you can name the parameter to access the unmatched part of the URL.
 
 ```jsx
-import { Router, Route } from "solid-router";
+import { Router, Route } from "@solidjs/router";
 
 import Home from "./Home";
 import About from "./About";

src/routes/solid-router/concepts/path-parameters.mdx

@@ -32,7 +32,7 @@ If a force re-render is needed, you can wrap your component in a keyed [`Show`](
 You can retrieve the values captured by parameters using [`useParams`](/solid-router/reference/primitives/use-params).
 
 ```jsx frame="terminal" title="http://localhost:3000/users/123"
-import { useParams } from "solid-router";
+import { useParams } from "@solidjs/router";
 
 function User() {
     const params = useParams();

src/routes/solid-router/concepts/search-parameters.mdx

@@ -9,7 +9,7 @@ In Solid Router, these query parameters can be accessed using [`useSearchParams`
 This primitive retrieves a tuple that contains a reactive object that reads the current search parameters and a function to update them.
 
 ```jsx {4}
-import { useSearchParams } from "solid-router";
+import { useSearchParams } from "@solidjs/router";
 
 export const App = () => {
 	const [searchParams, setSearchParams] = useSearchParams();
@@ -53,7 +53,7 @@ setSearchParams({
 If you require accessing the query string directly, you can use the [`useLocation`](/solid-router/reference/primitives/use-location) primitive:
 
 ```jsx
-import { useLocation } from "solid-router";
+import { useLocation } from "@solidjs/router";
 
 export const App = () => {
 	const location = useLocation();