Move a bunch of stuff from the position::move module over to a new chessfriend_moves crate

moves/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "chessfriend_moves"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+chessfriend_core = { path = "../core" }
+chessfriend_bitboard = { path = "../bitboard" }