Guide: Writing Custom Functions

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When a developer has finished installing and running their Homestar node:

• As the developer
  • Write Functions: I want to start writing my own functions so that I can create workflows that are relevant to my needs
  • (stretch) JS Support: I want to start writing functions in javascript - using hugo's stuff - so that I can contribute functions in the language I'm most familiar with.
  • (stretch) Code-based Workflow Building: I want to compose workflows in a code editor instead of just the visual builder, so that I can leverage my existing tools and work the way that I'm most comfortable
  • (stretch) Parallel Tasks: I want my workflows to have parallel execution of tasks, so that I can compose more complex workflow logic.

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The job stories here likely need to be broken out to separate issues in their respective repos. Let's tackle that as we start to write the guide in docs, which seems like the natural place to begin.