Create isle-installation-option-comparison.md

[highermath]

Add a page for ian nstallation option comparison chart

Purpose / why

We now have at least five options for creating a site using make. We need a place where users can compare them directly

What changes were made?

We are adding a new page.

Verification

This is a stub that needs work.

Interested Parties

• @Islandora/documentation
• @Islandora/committers

Checklist

Pull-request Reviewer

Pull-request reviewer should ensure the following:

• Does this PR link to related issues?
• Does the proposed documentation align with the Islandora Documentation Style Guide?
• Are the changes accurate, useful, free of typos, etc?

Person Merging

The person merging should ensure the following:

• Does mkdocs still build successfully? (This is indicated by TravisCI passing. To test locally, and see warnings, see How To Build Documentation.)
• If pages are renamed or removed, have all internal links to those pages been fixed?
• If pages are added, have they been linked to or placed in the menu?
• Did the PR receive at least one approval from a committer, and all issues raised have been addressed?

[highermath]

This should be take a bit further before it is merged.

[ysuarez]

I would love to see this PR merged even if it is missing some info.

@highermath (and others) what is is the bare minimum we can add to make it good enough to merge?

Is one of those things mentioning isle-site-template?

[rosiel]

I'm starting a comparison chart here based on this PR and including others. https://docs.google.com/spreadsheets/d/1tmvjyVPeQBM2LO7sq3lN0iMK0Cx_bIbhRp6k2glAxNs/edit#gid=0