Add string escaping to JSON formatter

[mikee47]

JSON does not support multiline text so control characters must be escaped.
This PR adds a generic escapeControls function to the Formatter classes, which is used by Format::json::escape().

[what-the-diff]

PR Summary

• Introduction of new file Formatter.cpp
  This new addition includes another file known as Formatter.h.

• Enhancements in Formatter.cpp
  We have furnished this file with a fresh function named escapeChar(). We've also effectively implemented an existing function called escapeControls().

• Modifications in Formatter.h
  There's a newcomer in the Format namespace, we've added a function named escapeControls().

• Detailed tweaks in Json.cpp
  We have improved our escape() function by incorporating the escapeControls() function from Formatter.h. This step ensures better functionality in our JSON formatting.