🧹 zephyr-snmp v0.1.0 - a huge cleanup!

zephyr-snmp adds SNMP v1 and v2c support to the Zephyr RTOS. It started as a port of the lwIP SNMP code, and along the way I concluded it would be easier to maintain if it went fully Zephyr-native: Zephyr code style, Zephyr APIs, etc. What is new in v0.1.0:

• A complete sample to start from
• CI in GitHub
• Release automation
• Extensive documentation

Doing things the Release First/Platform Thinking way ...