Add wasm support (#2199)

* Working towards a PoC for wasm

* Move bson and sqlite to plugins

* proof of concept now working

* tests are green

* Add CI test for --no-default-features

* Fix some tests

* Fix clippy and windows build

* More fixes

* Fix the windows build

* Fix the windows test

crates/nu-cli/tests/format_conversions/bson.rs

@@ -1,7 +1,7 @@
-use nu_test_support::{nu, pipeline};
-
+#[cfg(feature = "bson")]
 #[test]
 fn table_to_bson_and_back_into_table() {
+    use nu_test_support::{nu, pipeline};
     let actual = nu!(
         cwd: "tests/fixtures/formats", pipeline(
         r#"