RTK V0_4_5

[gwbres]

This PR introduces a few minor modifiations with huge positive impact

• Improve the Help/CLI Menus with better definitions and examples
• Fixed how we consider the TimeScale of Clock RINEX files and how we use it.
  By default most of these files use a GNSS timescale, not UTC. Take advantage of that to enhance the PVT solutions we resolve
• Simplified and improved Interpolator in the Positioning opmode: simplified code/api
• TEC Maps rendition is now feasible since Ploty-rs has been updated. Establish this new type of plot
• Minor fix in CPP with CGGTTS option where we used to fail to gather two signals
• RTK V0_4_5 Update comes with major improvements
  • CPP mode improved
  • New Kalman Filter: propose one example
  • Enhanced L1/L2/L5 management
  • Fix a bug in E1/E5 mode
  • PPP preliminary work

Kalman versus LSQ filter

1. LSQ previous implementation, still works and gives outstanding results

2. Kalman Filter is the best choice in navigation, it has been validated and works now correctly.
   Its usage is not totally perfect though and has to be further improved. See how it impacts the temporal solution positively. Improvements in PVT solutions are barelly noticeable, due to how we use the Kalman and how performant the current LSQ solver is