Imported project from old TinyTools repository

Added

• Added initial checkout implementation;
• Added tgit;
• Added update option on dmenu;
• Added license disclaimer on source code;
• Added first tgit README;
• Added -c and -u as color and update flags, respectively;
• Added code of conduct file;
• Added contributing file;
• Added github template files;

Fixed

• Fixed shell for git execution + added repo ignore regex;

Changed

• Updated README with team and license info;
• Refactored main loop of executions;
• Updated Makefile for tgit;
• Updated terminal call for each command;
• Set xdg terminal emulator;
• Separated code in files;