Fix span locations in ifmt and components (#3823)

* Fix span locations in ifmt

* Fix component spans

* Blame extra children on the first child element

* fix clippy

packages/rsx/src/template_body.rs

@@ -56,7 +56,7 @@
 use self::location::DynIdx;
 use crate::innerlude::Attribute;
 use crate::*;
-use proc_macro2::TokenStream as TokenStream2;
+use proc_macro2::{Span, TokenStream as TokenStream2};
 use proc_macro2_diagnostics::SpanDiagnosticExt;
 use syn::parse_quote;
 
@@ -386,4 +386,12 @@ impl TemplateBody {
             )
         }
     }
+
+    /// Get the span of the first root of this template
+    pub(crate) fn first_root_span(&self) -> Span {
+        match self.roots.first() {
+            Some(root) => root.span(),
+            _ => Span::call_site(),
+        }
+    }
 }