updates from devt branch

 Fix realtime command with not printable char not properly interpreted

- limit Switch debouncing can be enabled in config.h
- #127

- Uncomment #define USE_RMT_STEPS in config.h to use RMT based steps
- You can also use #define STEP_PULSE_DELAY 10 in config.h now

Devt

Fix another false error due to wrong copy/paste, thank you @bdring

Devt

Fix false error when reset wifi

Merge Devt to master

Update Station  connection failed message

Updated cpu_map for MPCNC machine
Added default settings for MPCNC machine

Update Local AP message

Push WebUI to master

Update Libraries
Add embedded
remove binary

Add basic platformio config.

limit.h disambiguation

renamed limits.h to grbl_limits.h and updated grbl.h to fix ambiguation issues with limit.h in the esp32 Arduino Framework when compiling with VS-Code/PlatformIO. Fixes INT_MAX not defined compile error. 

M4 is now Supported if SPINDLE_DIR_PIN is defined or laser mode is on.

cleaned up cpu_map.h and defaults.h

- Fixed math error
- Made some changes so pen can move to up posiiton at startup.

- Added Servo features
- Added Solenoid Features
- Added cpu_maps for pen/laser controler and midtbot

Allow Ctrl inputs to be disabled

Changed status report number format for FS: and F: fields

changed status report for override values from floats to whole number integers, as shown in grbl real time status report doc example.

Parenthesis was in the wrong place. (inherited from gnea/grbl)