Initialize rs schach engine

This reverts commit 28011b8f93.

rs/Cargo.toml

@@ -1,10 +1,8 @@
 [package]
 name = "schach"
 version = "0.1.0"
-edition = "2018"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-rocket = { version = "0.5.0-rc.1", features = ["json"] }
-serde = "1.0.127"

rs/src/main.rs

@@ -1,20 +1,3 @@
-#[macro_use]
-extern crate rocket;
-use rocket::serde::{json::Json, Serialize};
-
-#[derive(Serialize)]
-struct Greeting<'a> {
-    hello: &'a str,
-}
-
-#[get("/")]
-fn index() -> Json<Greeting<'static>> {
-    Json(Greeting {
-        hello: "Hello, world!",
-    })
-}
-
-#[launch]
-fn rocket() -> _ {
-    rocket::build().mount("/api/", routes![index])
+fn main() {
+    println!("Hello, world!");
 }

rs/src/pieces.rs

@@ -1,59 +0,0 @@
-enum PieceKind {
-    Rook,
-    Knight,
-    Bishop,
-    King,
-    Queen,
-    Pawn,
-}
-
-enum PieceColor {
-    Black,
-    White,
-}
-
-enum Column {
-    A,
-    B,
-    C,
-    D,
-    E,
-    F,
-    G,
-    H,
-}
-
-enum Row {
-    _1,
-    _2,
-    _3,
-    _4,
-    _5,
-    _6,
-    _7,
-    _8,
-}
-
-type Position = (Column, Row);
-
-struct Piece {
-    kind: PieceKind,
-    color: PieceColor,
-    position: Position,
-}
-
-struct Board {
-    pieces: Vec<Piece>,
-}
-
-impl Board {
-    fn fresh() -> Board {
-        Board {
-            pieces: vec![Piece {
-                kind: PieceKind::Rook,
-                color: PieceColor::Black,
-                position: (Column::A, Row::_8),
-            }],
-        }
-    }
-}