Scoped css (#5087)

* Create new css module parser

* Use css module processing

* Make hot reloading work for css_module macro

* Change css_module macro shape and rename to styles

* Add css_module example

* Update styles macro documentation

* Remove hidden from styles macro

* Remove unneeded param

* Remove unneeded visibility

* Improve `styles!` macro documentation

* Clippy

* Remove unneeded method

* Clippy

* Clippy

* Replace panic with anyhow

* Update css_module macro to attribute macro

* Update macro docs

* chore: Cargo.lock

* Clippy

* respect semver by deprecating old func

* update to latest winnow

---------

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

examples/assets/css_module2.css

@@ -0,0 +1,9 @@
+.test {
+    font-size: 24px;
+    color: darkblue;
+}
+
+.highlight {
+    background-color: yellow;
+    padding: 5px;
+}