feat: Update terminal to use panel, drawing tests

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 83.33333% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 90.35%. Comparing base (0fdafb8) to head (0b7dba7).

Files	Patch %	Lines
inky_pi/display/terminal_draw.py	83.33%	2 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #21 +/- ## ========================================== - Coverage 90.54% 90.35% -0.20% ========================================== Files 18 18 Lines 730 736 +6 Branches 71 72 +1 ========================================== + Hits 661 665 +4 - Misses 56 57 +1 - Partials 13 14 +1 ```

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