Limit plugins to use interfaces only

[martinheidegger]

For plugins to work well loaded dynamically, the definition of createPlugin needs to be put into a separate dependency (@tradle/plugin ?) that contains only the interfaces and is used as an intermediate between the plugins loaded and mycloud.

mycloud/src/in-house-bot/plugin-types.d.ts

Line 148 in d86ae91

export type CreatePlugin<BotComponent> = (components:IBotComponents, opts:IPluginOpts) => IPluginExports<BotComponent>

Additionally, current plugins freely access a variety of sources. External dependencies such as @tradle/constants are okay but internal dependencies, such as in the examples below, will make it impossible to move the plugins outside of this repository. These need to be changed into either external dependencies or inlined into the plugin.

• mycloud/src/in-house-bot/plugins/complyAdvantage.ts

  Line 18 in d86ae91

  } from '../utils'

• mycloud/src/in-house-bot/plugins/creditBuroCheck.ts

  Line 21 in d86ae91

  import Errors from '../../errors'

• mycloud/src/in-house-bot/plugins/draftApplication.ts

  Line 4 in d86ae91

  import { sendConfirmationEmail } from '../email-utils'