Create a samples.md file and write up the recent example in transforming a sheet and all of its content to a target iModel

[nick4598]

I don't know how to link these into the docs just yet, but I think it may be useful to do so in the future.

Create the file at root of repo.

Using these two commits
Commit 1: https://github.com/iTwin/drawing-production/commit/94c17cb301dce73bb98be9df05646be95ab8feb0
Commit 2: https://github.com/iTwin/drawing-production/commit/129b2fd678dca7e4acd7e6ecf884b4a3bea205f5

We should grab all the relevant code and add comments to it all