Implemented new actions `FirstTab`, `LastTab`, `FirstSplit` and `LastSplit`#3403

Merged

dmaluka merged 2 commits intozyedidia:masterfrom

masmu:refactor/tab-actions

Sep 16, 2024

Commits on Sep 15, 2024

Implemented new actions `FirstTab`, `LastTab`, `FirstSplit` and `LastSplit` and changed the default behavior of `NextTab`, `PreviousTab`, `NextSplit`, `PreviousSplit` to not walk in circles anymore
masmu
committed
Fixes a bug where new `BufPanes` are not being inserted into the right array index.
masmu
committed