It improves the example to describe with an example the following metas:
- heroText
- tagline

Internal changes:

- More convenient way to add async functional option APIs.

Since --no-cache is defined, --cache/--no-cache can only be a boolean, and so any argument that you attempt to pass to --cache is interpreted as an individual argument, and in this case becomes the targetDir.

Refs:

- https://github.com/nodejs/node/issues/21203
- https://github.com/nodejs/node/commit/cbc3ef64ceaf95ec1d0d1535211ce3a6945407e1

* feat($core): support Vue SFC as source files

* refactor: When Vue SFCs are source files, make them as layout components directly.

* chore: tweaks

This commit also convert the AppContext into a singleton.