functional prototype

update docs and structs, add actual logic, now it actually works

docs/default-max-threads.md

@@ -1,38 +0,0 @@
-# Default `max-threads`
-
-The default `max-threads` uses a simple algorithm to get how many threads.
-
-```rs
-if total_threads >= 32 {
-    return total_threads - 4;
-} else if total_threads >= 12 {
-    return total_threads - 2;
-} else if total_threads >= 3 {
-    return total_threads - 1;
-} else {
-    return total_threads;
-}
-```
-
-i.e. with `total_threads` as the number of threads the CPU(s) has:
-
-- If the CPU has 32 or more threads, it will use all but 4 threads
-- If the CPU has 12 or more threads, it will use all but 2 threads
-- If the CPU has 3 or more threads, it will use all but 1 thread
-- Otherwise, i.e. if the CPU has 1 to 2 threads, it will use all threads
-
----
-
-Alternative algorithms I tried:
-
-```rs
-if total_threads >= 32 {
-    return total_threads - total_threads.div_ceil(10);
-} else if total_threads >= 12 {
-    return total_threads - 2;
-} else if total_threads >= 3 {
-    return total_threads - 1;
-} else {
-    return total_threads;
-}
-```