functional prototype

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

docs/behind-the-scenes/commands.md

@@ -0,0 +1,3 @@
+# How commands are run
+
+I was unable to find a way to directly run *multiple* commands via Docker/Podman. Instead of doing that, greg puts all the commands in a temporary script, mounts it inside, and then run it with 

docs/behind-the-scenes/default-max-threads.md

@@ -0,0 +1,38 @@
+# 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;
+}
+```