📝 Update comments in bedleveling/probe - feature/gcode

[classicrocker883]

Description

Most changes are to feature/bedlevel/, gcode/bedlevel/, and gcode/probe/

Major changes to the comment blocks having details about Gcode commands. Updated with doxygen commands with better understand and readability.

Updates and changes including but not limited to:

• Spacing
• Remove periods at end and capitialize first word in sentence (like rest of code)
• Update/add doxygen comment commands
• Update/improve Gcode descriptions. Better readability, ect...

A couple files had some outliers that needed fixed, like **/ instead of */

Requirements

Benefits

Improves readability, Updates descriptions/details/usage of the gcodes while adding doxygen commands.

Configurations

Related Issues

in feature/bedlevel/ubl/ubl_G29.cpp (and also in MarlinDocumentation) one thing stood out that is wrong

G29 Z C uses the Current location (instead of bed center or nearest edge).

UBL G29 doesnt have anything that reads for 'Z' so not sure what this is about.

[sjasonsmith]

I reverted the code change that was mixed into this. The rest will have to wait for @thinkyhead to make the call on whether he wants these comment changes or not.

[thinkyhead]

The use of @brief, @description, @param, etc. in the descriptions of G-code parameters is improper. Those changes will all need to be reverted.