allow users to define a variable number of lines in font_config

[pkmnsnfrn]

Original Discussion

This allow users to define an arbitrary number of lines for their message boxes, and poryscript will format text accordingly.

numLines == 3

numLines == 2

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (c4eb930) 92.56% compared to head (3e872d7) 92.74%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #59 +/- ## ========================================== + Coverage 92.56% 92.74% +0.17% ========================================== Files 7 7 Lines 2409 2467 +58 ========================================== + Hits 2230 2288 +58 Misses 114 114 Partials 65 65 ```

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