docs: add import statements to doc pages

[michael-small]

Issue: docs: add import to doc pages #155

#155

[michael-small]

@rainerhahnekamp I added imports to the big functions on the sidebar. However, there is helper functions for some things, such as

import { renameDevtoolsName } from '@angular-architects/ngrx-toolkit';

or

import { createReducer } from '@angular-architects/ngrx-toolkit';

among some other functions.

I assume each should have its import listed somewhere on the pages too? I'm thinking either

1. In the example blocks, or
2. Under its own header just like the whole pages have their own block at the top

Thoughts?

Once you make a call on that I'll be ready to get this out as a ready PR

[rainerhahnekamp]

Can we add it to both or would that be too much?

[msmallest]

That should be good

[michael-small]

I went back across everything all the pages and added imports to everything including

• Top of the page for the main functions
• Top of the subsections for helper functions
• All code blocks using any toolkit function, even if the function isn't the main example (withUndoRedo in withDataService examples etc)

I also accidentally managed to add imports for withReset even though that is the other PR, but that PR still adds it to the sidenav so that PR is still relevant.

[rainerhahnekamp]

Thanks a lot @michael-small