feat(ct): vue2 plugins

[sand4rt]

There is no support for Vue2 plugins (probably because there was no test yet describing/documenting this behaviour) and did some minor refactoring.

[pavelfeldman]

Why do we special-case router?: unknown, store?: unknown, [key: string]: unknown here?

[sand4rt]

I changed it to & Record<string, unknown> otherwise the type error below is thrown. This is also to support:

new Vue({
  test: 'test', // it is possible to pass any key when creating the Vue object
  router,
  render: h => h(App),
}).$mount('#app');

playwright/index.ts:10:26 - error TS2345: Argument of type '({ Vue, hooksConfig }: { hooksConfig: HooksConfig; Vue: VueConstructor<Vue<Record<string, any>, Record<string, any>, never, never, (event: string, ...args: any[]) => Vue<Record<string, any>, Record<...>, never, never, ...>>>; }) => Promise<...>' is not assignable to parameter of type '(params: { hooksConfig: HooksConfig; Vue: VueConstructor<Vue<Record<string, any>, Record<string, any>, never, never, (event: string, ...args: any[]) => Vue<Record<string, any>, Record<...>, never, never, ...>>>; }) => Promise<...>'.
  Type 'Promise<{ test: string; }>' is not assignable to type 'Promise<void | ComponentOptions<Vue<Record<string, any>, Record<string, any>, never, never, (event: string, ...args: any[]) => Vue<Record<string, any>, Record<string, any>, never, never, ...>>, ... 7 more ..., ComponentOptionsMixin>>'.
    Type '{ test: string; }' is not assignable to type 'void | ComponentOptions<Vue<Record<string, any>, Record<string, any>, never, never, (event: string, ...args: any[]) => Vue<Record<string, any>, Record<string, any>, never, never, ...>>, ... 7 more ..., ComponentOptionsMixin>'.

10 beforeMount<HooksConfig>(async ({ Vue, hooksConfig }) => {

[pastelsky]

@sand4rt Looks like you have a failing build — might be a flake though. Do you mind re-running?

[sand4rt]

@pastelsky I don't think it is related to my changes, but sure

[pastelsky]

I know — was probably flake. Just giving it a gentle nudge since this seems like a pre-req for #18616