Add support for luminous flux and illuminace

[cmichelenstrofer]

🚨 Checklist

• Read and follow the Contributing Guidelines.
• Provide a more detailed description below, including referencing or closing the relevant issue(s)

💔 Thanks!

PR Description

• Closes 🚀 Support for luminous flux (lumens) and illuminance (lux) #35.
• include candela in DefaultSymbols
• define lumen and lux with dimensions of angles

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (c5d36b6) 83.07% compared to head (2a40d45) 83.66%.
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #40      +/-   ##
==========================================
+ Coverage   83.07%   83.66%   +0.58%     
==========================================
  Files           7        7              
  Lines         195      202       +7     
==========================================
+ Hits          162      169       +7     
  Misses         33       33              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.