nKeep Persistent Context + Persistent Context Token Counts

[neCo2]

Built on #56
Made memory and wi use n-keep for llama.cpp and kobold.cpp so it won't get flushed out of context. Since the opportunity arose, I also added token counts for the persistent context fields.

[neCo2]

All right, I fixed my botched merge. Should be ready for review again.
Also for some reason I remember you changing something related to world info, but I can't for the life of me find the change I'm looking for.
If I didn't hallucinate that change, please check whether this PR overwrote anything or would otherwise cause problems with it.

[neCo2]

A bit late to realize, but am I misunderstanding the functionality of n-keep? Can the memory even be "flushed" out of the context like I thought it could? If not, a lot of this PR could be scrapped.

[lmg-anon]

Afaik, n_keep is just what we are already doing but more accurate (i.e., it keeps n tokens at the beginning of the context). No backend will 'flush the context' as long as the prompt is within the context window.

[lmg-anon]

Also for some reason I remember you changing something related to world info, but I can't for the life of me find the change I'm looking for.
If I didn't hallucinate that change, please check whether this PR overwrote anything or would otherwise cause problems with it.

Nah, I think you must be imagining things. As far as I remember, the only changes I made to the code related to WI were when I moved some code to the WorldInfoModal and the draft PR #63. But neither change really altered how WI works in any way.

[neCo2]

No backend will 'flush the context'

Well, that's an afternoon of coding down the drain. The Token Counts for Memory, AN and WI could still be useful, but frankly, they don't seem all that important to me.
On the other hand all the work's already done, and cutting the PR down to just the token counts should be trivial now, so maybe I'll open a new PR just for that?

moved some code to the WorldInfoModal and the draft PR #63

That's probably what I was thinking of then.