Add Hotwire Native tools

[leonvogt]

It could be useful to add some time savers for Hotwire Native development.
I can think of two things that could be useful:

Set the current user agent:
The user can create a list of possible user agents and can select the ones that are needed for the current development.

• Turbo Native
• Hotwire Native
• app-version: 1.2.1
• app-version: 2.0.0
• bridge-components: [form menu overflow-menu]

We would take the selected options and create a user agent string that can be used in the browser.

Execute preconfigured JS:
The user can create a list of JS snippets that can be executed in the current tab.
Like:

• window.bridge.postNativeToJS("didPressMenuButton")
• window.bridge.postNativeToJS("didEnterForeground")