Add filestream IO examples to website

[jpat1546]

BCODB-211

[jpat1546]

~ Diff ways to rep a file in the IO of the DD in a meaningful way according to the standard

"If files are produced at each step and can be viewed by the public, they can be hosted in a repository and referred to there, but the URI is flexible and can handle other scenarios. Two examples are shown here"

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(Couldn't upload to issue as a JSON, so converted to TXT for upload. Pls change suffix before uploading into server)
FDA_416356 (2).txt
example.txt