feat(wasi-observe): A WIP WASI Observe host component

Signed-off-by: Caleb Schoepp <caleb.schoepp@fermyon.com>

Author: calebschoepp

crates/runtime-config/src/lib.rs

@@ -389,6 +389,12 @@ impl FactorRuntimeConfigSource<ObserveFactor> for TomlRuntimeConfigSource<'_, '_
     }
 }
 
+impl FactorRuntimeConfigSource<ObserveFactor> for TomlRuntimeConfigSource<'_, '_> {
+    fn get_runtime_config(&mut self) -> anyhow::Result<Option<()>> {
+        Ok(None)
+    }
+}
+
 impl RuntimeConfigSourceFinalizer for TomlRuntimeConfigSource<'_, '_> {
     fn finalize(&mut self) -> anyhow::Result<()> {
         Ok(self.toml.validate_all_keys_used()?)