Result alias for convienient use of anyhow::Error without depending on anyhow (#5853)

* Add a Result type alias

* Refer to the type in top-level docs

* Use this inside the documentation for the bindgen! macro

* Fix tests

* Address small PR feedback

* Simply re-export anyhow types

crates/fuzzing/src/oracles.rs

@@ -785,7 +785,6 @@ pub fn set_fuel<T>(store: &mut Store<T>, fuel: u64) {
 /// arbitrary types and values.
 pub fn dynamic_component_api_target(input: &mut arbitrary::Unstructured) -> arbitrary::Result<()> {
     use crate::generators::component_types;
-    use anyhow::Result;
     use component_fuzz_util::{TestCase, EXPORT_FUNCTION, IMPORT_FUNCTION};
     use component_test_util::FuncExt;
     use wasmtime::component::{Component, Linker, Val};