Add a cargo workspace containing both crates (#321)

* Move Cargo.toml for exercises to exercises directory.

* Create a workspace with both exercises and i18n-helpers.

* Build in CI as well as testing.

* Binaries must have a main function.

* No need for workspaces configuration for caching anymore.

src/exercises/Cargo.toml

@@ -0,0 +1,46 @@
+[package]
+name = "comprehensive-rust"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[[bin]]
+name = "for-loops"
+path = "day-1/for-loops.rs"
+
+[[bin]]
+name = "book-library"
+path = "day-1/book-library.rs"
+
+[[bin]]
+name = "points-polygons"
+path = "day-2/points-polygons.rs"
+
+[[bin]]
+name = "luhn"
+path = "day-2/luhn.rs"
+
+[[bin]]
+name = "strings-iterators"
+path = "day-2/strings-iterators.rs"
+
+[[bin]]
+name = "safe-ffi-wrapper"
+path = "day-3/safe-ffi-wrapper.rs"
+
+[[bin]]
+name = "simple-gui"
+path = "day-3/simple-gui.rs"
+
+[[bin]]
+name = "dining-philosophers"
+path = "day-4/dining-philosophers.rs"
+
+[[bin]]
+name = "link-checker"
+path = "day-4/link-checker.rs"
+
+[dependencies]
+reqwest = { version = "0.11.12", features = ["blocking"] }
+scraper = "0.13.0"
+thiserror = "1.0.37"

src/exercises/day-2/points-polygons.rs

@@ -222,3 +222,5 @@ mod tests {
     }
 }
 // ANCHOR_END: unit-tests
+
+fn main() {}

src/exercises/day-2/solutions-morning.md

@@ -6,7 +6,4 @@
 
 ```rust
 {{#include points-polygons.rs}}
-
-#[allow(dead_code)]
-fn main() {}
 ```

src/exercises/day-2/strings-iterators.rs

@@ -68,3 +68,5 @@ fn test_matches_with_wildcard() {
     ));
 }
 // ANCHOR_END: unit-tests
+
+fn main() {}