Make exemplar root index.ts pull tab name from miskTab file

[adrw]

Currently

import { createApp, createIndex } from "@misk/core"
import * as Ducks from "./ducks"
import routes from "./routes"

export * from "./components"
export * from "./containers"

createIndex("home", createApp(routes), Ducks)

Want to get rid of manual setting of "home" which is prone to being forgotten if tab is renamed.

import { createApp, createIndex } from "@misk/core"
import miskTab from "../miskTab"
import * as Ducks from "./ducks"
import routes from "./routes"

export * from "./components"
export * from "./containers"

createIndex(miskTab.slug, createApp(routes), Ducks)

Challenges

• Difficult / impossible to read a file from outside of src/ in past experience