feat!: update and extend V API

[ttytm]

The changes update and extend the V API. It makes changes and includes features to extend the libraries capabilities and make it simpler to use.

• Introduces the types EventId and JSArgs that are used in the bind method https://github.com/ttytm/webview/blob/0dd6b0b2f4ce2cfe7875321d069754709e592625/src/lib.v#L128
• The function returning data from V to JS is updated from result to @return. It now uses the new EventId as argument. The JS result is now automatically encoded instead of needing to encode it into a json manually. https://github.com/ttytm/webview/blob/0dd6b0b2f4ce2cfe7875321d069754709e592625/src/lib.v#L141
• Introduces the copy method for the new EventId type that should be used if wanting to return a JS result form another thread. https://github.com/ttytm/webview/blob/0dd6b0b2f4ce2cfe7875321d069754709e592625/src/lib.v#L165
• Introduces utility functions for the new JSArgs type to access arguments https://github.com/ttytm/webview/blob/0dd6b0b2f4ce2cfe7875321d069754709e592625/src/lib.v#L165 https://github.com/ttytm/webview/blob/0dd6b0b2f4ce2cfe7875321d069754709e592625/src/lib.v#L170 https://github.com/ttytm/webview/blob/0dd6b0b2f4ce2cfe7875321d069754709e592625/src/lib.v#L175 https://github.com/ttytm/webview/blob/0dd6b0b2f4ce2cfe7875321d069754709e592625/src/lib.v#L180 https://github.com/ttytm/webview/blob/0dd6b0b2f4ce2cfe7875321d069754709e592625/src/lib.v#L185 https://github.com/ttytm/webview/blob/0dd6b0b2f4ce2cfe7875321d069754709e592625/src/lib.v#L190 https://github.com/ttytm/webview/blob/0dd6b0b2f4ce2cfe7875321d069754709e592625/src/lib.v#L195
• Updates a and simplifies examples, adds a new example v-js-interop-simple, renames v-js-interop to v-js-interop-app

The changes introduced changes bring a lot of improvements that and hopefully outweigh the updates they require. Nevertheless, my apologies for the inconvenience while updating.