Add beginning of time focused chapter

[d33bs]

Description

This PR adds the beginning of a time-focused chapter as part of addressing #25 .

Thanks for any thoughts or feedback you may have!

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• Content additions or updates (adds or updates content)
• Bug fix (fixes an issue).
• Enhancement (adds functionality).
• Breaking change (these changes would cause existing functionality to not work as expected).

Checklist

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[falquaddoomi]

Neat; I like the idea of software following a lifecycle, and your metaphors are vivid. I left a question, but otherwise it all looks good to me.

[gwaybio]

Love to see the expanded material! It's coming together nicely! I made a couple comments, but I think its ready to merge

[d33bs]

Thanks @falquaddoomi and @gwaybio ! Merging this in after responding to your thoughts and changing things around a bit.