refactor(core): add webview events (#8844)

* refactor(core): add webview events

* license header

* clippy

* fix doctests

* more doctests

* fix JS `listen` with `EventTarget::Any`

* typo

* update module import

* clippy

* remove console.log

* fix api example

* fix documentation for emiTo [skip ci]

* actually add RunEvent::WebviewEvent

* update migration

* lint

---------

Co-authored-by: Lucas Nogueira <lucas@tauri.app>

.github/workflows/test-core.yml

@@ -94,7 +94,7 @@ jobs:
       - name: test (using cross)
         if: ${{ matrix.platform.cross }}
         run: |
-          cargo install cross --git https://github.com/cross-rs/cross
+          cargo install cross --git https://github.com/cross-rs/cross --locked
           cross ${{ matrix.platform.command }} --target ${{ matrix.platform.target }} ${{ matrix.features.args }}
 
       - name: test (using cargo)