Introduced defineAction which handles registry for actions under the hood

[pavelgj]

const geminiPro = defineAction({
  actionType: 'model',
  name: 'googleai/gemini-pro',
  // ...
}, (input) => {
  // ...
})

or

const geminiPro = defineAction({
  actionType: 'model',
  name: {
    pluginId: 'googleai',
    actionId: 'gemini-pro',
  },
  // ...
}, (input) => {
  // ...
})

this will register this action in the registry under /model/googleai/gemini-pro

Formalized action naming -- there are two types of actions
1. actions provided by plugins - they must be named pluginId/actionId
2. actions not provided by plugins - their name cannot contain slashes (/)

actions not associated with a plugin

const geminiPro = defineAction({
  actionType: 'model',
  name: 'myCustomModel',
  // ...
}, (input) => {
  // ...
})

[mbleigh]

Only had time for a quick glance, but 👍 on the direction.