usage

before use, you should install bun，see bun

npm start

feature

1. support mountApp，which is main entry.
2. support reactive, which is to make the object reactive.
3. support mount，which is to mount the virtual DOM to the specified container.
4. support patch， which is to diff and update the virtual DOM.
5. support watchEffect, which is to watch the reactive object and execute the callback function when the object changes.