refactor: Rename all remaining conduwuit references to Continuwuity

Also adds an alias for the old binary name to the dockerfile

Supersedes !1485
Closes #1536
Closes #2277

docs/development/testing.mdx

@@ -12,7 +12,7 @@ Install Git, Rust, Docker, Go, and `jq`. From this repository's root, build the
 server image and run the suite:
 
 ```bash
-cargo build -p conduwuit
+cargo build -p continuwuity
 docker build -t continuwuity:complement -f docker/complement.Dockerfile .
 ./bin/complement
 ```