Split view support

[KRTirtho]

Is your feature request related to a problem? Please describe.
Currently, wives tabs can't be split. So multitasking is not that much flexible

Describe the solution you'd like
Implementation steps:

• Use groups of terminal (List<Terminal>) for each Tab
• Two split buttons
  • Horizontal: splits the terminal horizontally
  • Vertical: splits the terminal vertically
    (The split is only allowed maximum of 8x8) It's now freaking infinite

Note: The new split_view and tabs implements the new tree Algorithm IRT (Infinite Roots Tree) Algorithm

[KRTirtho]

Done #5