Create Developer Persona for Knative

## What is changing? (Please include as many details as possible.)

We want to create a developer persona, complete with persona name, attributes, wants, needs and pains.

## Context

The DUX WG has expressed interest in separating the documentation by persona, this would be a first step in achieving that outcome.

## How will this impact Knative users?

Users will more easily be able to find topics relevant to their persona as a developer, and not be bogged down with the complexity of other persona's needs (such as administrators)

## Prototype

N / A

## Potential Feature List

N / A

Start with the issue requirements and the stated DUX WG goal of separating documentation by persona; no files, tests, or entry points are identified. Define a developer persona with a name, attributes, wants, needs, and pains. The work is done when that persona is documented clearly enough to guide persona-specific documentation.

Written by the indexing model from the issue text.