Add a ton of comments to rsx/hotreload, add snapshot testing, refactor a bit to simplify the crate (#2130)

Merge dynamic context and dynamic mapping, clean up the rsx hotreload logic, and add location data to the Rsx objects

packages/rsx/src/location.rs

@@ -0,0 +1,8 @@
+/// Information about the location of the call to a component
+///
+/// This will be filled in when the dynamiccontext is built, filling in the file:line:column:id format
+///
+#[derive(PartialEq, Eq, Clone, Debug, Hash, Default)]
+pub struct CallerLocation {
+    inner: Option<String>,
+}