Autocomplete rsx (#2421)

* autocomplete rsx

* hide the completions module

* fix autocomplete for identifiers that start with a raw identifier

* add field completion hints for props

* remove extra import

* Revert "add field completion hints for props"

This reverts commit 194899c73783e0f9b5d601d53365746d838f2048.

* fix autocomplete inside raw expressions

* fix autofmt

* feat: just use regular ifmt if it's compatible

reuses the tokens for ifmt so RA provides its HIR lowering on simple formatted strings

* fix merging ifmt strings

* add a better error message for components called like functions

---------

Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>

packages/rsx/src/errors.rs

@@ -1,6 +1,12 @@
+use proc_macro2::Span;
+
+pub(crate) fn missing_trailing_comma(span: Span) -> syn::Error {
+    syn::Error::new(span, "missing trailing comma")
+}
+
 macro_rules! missing_trailing_comma {
     ($span:expr) => {
-        return Err(syn::Error::new($span, "missing trailing comma"));
+        return Err(crate::errors::missing_trailing_comma($span));
     };
 }