Deprecate relative asset paths, better warnings for asset!() (#3214)

* Deprecate relative asset paths

* fix paths, better warnings in asset parser

examples/calculator_mutable.rs

@@ -31,7 +31,7 @@ fn app() -> Element {
     rsx! {
         document::Link {
             rel: "stylesheet",
-            href: asset!("./examples/assets/calculator.css"),
+            href: asset!("/examples/assets/calculator.css"),
         }
         div { id: "wrapper",
             div { class: "app",

examples/crm.rs

@@ -32,7 +32,7 @@ fn main() {
                 }
                 document::Link {
                     rel: "stylesheet",
-                    href: asset!("./examples/assets/crm.css"),
+                    href: asset!("/examples/assets/crm.css"),
                 }
                 h1 { "Dioxus CRM Example" }
                 Router::<Route> {}

examples/read_size.rs

@@ -30,7 +30,7 @@ fn app() -> Element {
     rsx! {
         document::Link {
             rel: "stylesheet",
-            href: asset!("./examples/assets/read_size.css"),
+            href: asset!("/examples/assets/read_size.css"),
         }
         div {
             width: "50%",

examples/resize.rs

@@ -17,7 +17,7 @@ fn app() -> Element {
     rsx!(
         document::Link {
             rel: "stylesheet",
-            href: asset!("./examples/assets/read_size.css"),
+            href: asset!("/examples/assets/read_size.css"),
         }
         div {
             width: "50%",