Techlahoma's Slack rules

[kacollins]

Add links to these:

• https://www.techlahoma.org/code-of-conduct
• https://docs.google.com/document/d/1rIii2XhMFa5k33q9c-S4qCsGeH6qtOyhT1nNpzup4BU
• https://docs.google.com/document/d/1Ew9bmzkt4FoPJvyYUytFTTBwhimulXF05ntHonZMdA0/