feat: Add tardis timeline view

[fpohtmeh]

That may be some sidebar where the user can find the entire history and the current position in the tardis.

[FredeHoey]

I will not be implementing this myself, however, a PR with an option to enable a tree would be welcome :+1:

[Dima-369]

@FredeHoey I know you want to drop naming the buffers (from https://github.com/FredeHoey/tardis.nvim/issues/11#issuecomment-3120200813), but I still want to throw out that having the buffers named with an index count like below helps to identify where the current position is (in a pretty easy way).

Here, the file has 12 total git changes, and we are on index 6.

Just an idea 😉

[FredeHoey]

@Dima-369 feel free to drop a PR

[Dima-369]

@Dima-369 feel free to drop a PR

I dropped https://github.com/FredeHoey/tardis.nvim/pull/19