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/commands/cd.rs

@@ -127,6 +127,7 @@ fn filesystem_change_current_directory_to_parent_directory_after_delete_cwd() {
     })
 }
 
+#[cfg(feature = "dirs")]
 #[test]
 fn filesystem_change_to_home_directory() {
     Playground::setup("cd_test_8", |dirs, _| {