micrOS 2.6

WebUI - webserver and interface improvements

• Webserver file response (html, js, css)
  • improved index.html
  • new dashboard.html
  • refactors: uapi.js, udashboard.js, uwidgets.js, uwidgets_pro.js
  • common ustype.css
• Finalized Load module interfaces:
  • microIO.py
  • Common.py
  • Types.py for frontend generation - dashboard webapp
• Simulator improvements
• Generic micrOS core improvements

What's Changed

• Time to sleep for keychain by @KKristof452 in #32
  Full Changelog: v2.0.0-0...v2.6.0-0

micrOS 2.0 LTS

Micropython base: 1.21.x

micrOS 2.0 LTS

	Core:
                - ShellCli - high performance low level communication and configuration interface
		- WebCli (http server with endpoints: / and /rest and /<custom>)
		- Full async as technically possible (WebCLI, ShelCLI, TaskManager (LM), InterCon)
			- rest (urequests) stays sync module (https limitation with async.) 
		- Extensive testing and quality checks (system tests, pylint) 
		Web Frontends:
			- index.html
                - Common.py interface for LoadModule-s documentation
	
	Load Module:
		- Camera support (LM_OV2640.py)
		- I2S mic support
		- dashboard backend (LM_dashboard_be.py)
		Web Frontends:
		- dashboard.html

micrOS gateway - micrOS cluster monitoring, etc.

HW Project 🎲:
- LM_KeyChain HW+SW for the 2.0 anniversary. - project videos coming soon :D