Add 'Get Started' guide for finding ORFIs and update documentation na… #277

Job	Run time
Documentation	2m 34s
Julia nightly - ubuntu-latest - x64 - push	1m 56s
Julia nightly - macOS-latest - x64 - push	2m 43s
Julia nightly - windows-latest - x64 - push	2m 27s
	9m 40s

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