generate-kotlin-js-browser-webroot: support Wasm + safer frontend task lookup

[ShreckYe]

Summary

com.huanshankeji.generate-kotlin-js-browser-webroot-for-vertx-web currently hardcodes jsBrowserDistribution and looks it up with tasks.getting inside afterEvaluate of the consuming project.

That is insufficient when:

1. Wasm — consumers need wasmJsBrowserDistribution (and typically *.wasm / related assets), not only JS.
2. Evaluation order — if the frontend KMP project has not registered the distribution Sync yet, configuration fails with “Task with name '…BrowserDistribution' not found”. Workarounds need evaluationDependsOn(frontend) or a lazy tasks.named(…).

Ask

Extend the plugin (or add a sibling) so consumers can choose JS vs Wasm (or both), include Wasm artifacts, and resolve the frontend distribution task without fragile evaluation-order failures.

[ShreckYe]

Also, the extension name generateKotlinJsResources may be improved. It's not very straightforward, and also not conventional as it looks to me now.