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//store.js
import Vue from 'vue';
import Vuex from 'vuex';

Vue.use(Vuex);

export default new Vuex.Store({
  ...
});

//another-file.js
import store from './path/to/store.js';

console.log(store);

const requireComponents = {};
const requireComponentContext = require.context('./', false, /\.vue$/i, 'lazy'); //lazy!
requireComponentContext.keys().forEach((fileName, index) => {
	//componentName может быть по названию файла, смотрите пример в документации.
	const componentName = `MySuperComponent-${index + 1}`;
	const componentConfig = requireComponentContext(fileName);
	requireComponents[componentName] = () => componentConfig;
});

//vue instance
export default {
	components: {
		...requireComponents
	}
}

<my-super-component-1></my-super-component-1>
<my-super-component-2></my-super-component-2>
...

{
  components: {
    Render: {
      functional: true,
      render: (h, ctx) => ctx.props.vnode
    }
  }
}

<div class="header">
  <render :vnode="$slots.menu"></render>
</div>
<div class="fixed-header">
  <render :vnode="$slots.menu"></render>
</div>