rustlings: move to rust/

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diff --git a/rust/rustlings/exercises/06_move_semantics/README.md b/rust/rustlings/exercises/06_move_semantics/README.md
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+# Move Semantics
+
+These exercises are adapted from [pnkfelix](https://github.com/pnkfelix)'s [Rust Tutorial](https://pnkfelix.github.io/rust-examples-icfp2014/) -- Thank you Felix!!!
+
+## Further information
+
+For this section, the book links are especially important.
+
+- [Ownership](https://doc.rust-lang.org/book/ch04-01-what-is-ownership.html)
+- [Reference and borrowing](https://doc.rust-lang.org/book/ch04-02-references-and-borrowing.html)
diff --git a/rust/rustlings/exercises/06_move_semantics/move_semantics1.rs b/rust/rustlings/exercises/06_move_semantics/move_semantics1.rs
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+++ b/rust/rustlings/exercises/06_move_semantics/move_semantics1.rs
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+fn fill_vec(vec: Vec<i32>) -> Vec<i32> {
+    let mut vec = vec;
+
+    vec.push(88);
+
+    vec
+}
+
+fn main() {
+    // You can optionally experiment here.
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn move_semantics1() {
+        let vec0 = vec![22, 44, 66];
+        let vec1 = fill_vec(vec0);
+        assert_eq!(vec1, vec![22, 44, 66, 88]);
+    }
+}
diff --git a/rust/rustlings/exercises/06_move_semantics/move_semantics2.rs b/rust/rustlings/exercises/06_move_semantics/move_semantics2.rs
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+++ b/rust/rustlings/exercises/06_move_semantics/move_semantics2.rs
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+fn fill_vec(vec: Vec<i32>) -> Vec<i32> {
+    let mut vec = vec;
+
+    vec.push(88);
+
+    vec
+}
+
+fn main() {
+    // You can optionally experiment here.
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    // TODO: Make both vectors `vec0` and `vec1` accessible at the same time to
+    // fix the compiler error in the test.
+    #[test]
+    fn move_semantics2() {
+        let vec0 = vec![22, 44, 66];
+
+        let vec1 = fill_vec(vec0.clone());
+
+        assert_eq!(vec0, [22, 44, 66]);
+        assert_eq!(vec1, [22, 44, 66, 88]);
+    }
+}
diff --git a/rust/rustlings/exercises/06_move_semantics/move_semantics3.rs b/rust/rustlings/exercises/06_move_semantics/move_semantics3.rs
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+++ b/rust/rustlings/exercises/06_move_semantics/move_semantics3.rs
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+// TODO: Fix the compiler error in the function without adding any new line.
+fn fill_vec(mut vec: Vec<i32>) -> Vec<i32> {
+    vec.push(88);
+
+    vec
+}
+
+fn main() {
+    // You can optionally experiment here.
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn move_semantics3() {
+        let vec0 = vec![22, 44, 66];
+        let vec1 = fill_vec(vec0);
+        assert_eq!(vec1, [22, 44, 66, 88]);
+    }
+}
diff --git a/rust/rustlings/exercises/06_move_semantics/move_semantics4.rs b/rust/rustlings/exercises/06_move_semantics/move_semantics4.rs
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+++ b/rust/rustlings/exercises/06_move_semantics/move_semantics4.rs
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+fn main() {
+    // You can optionally experiment here.
+}
+
+#[cfg(test)]
+mod tests {
+    // TODO: Fix the compiler errors only by reordering the lines in the test.
+    // Don't add, change or remove any line.
+    #[test]
+    fn move_semantics4() {
+        let mut x = Vec::new();
+        let y = &mut x;
+        y.push(42);
+        let z = &mut x;
+        z.push(13);
+        assert_eq!(x, [42, 13]);
+    }
+}
diff --git a/rust/rustlings/exercises/06_move_semantics/move_semantics5.rs b/rust/rustlings/exercises/06_move_semantics/move_semantics5.rs
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+++ b/rust/rustlings/exercises/06_move_semantics/move_semantics5.rs
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+#![allow(clippy::ptr_arg)]
+
+// TODO: Fix the compiler errors without changing anything except adding or
+// removing references (the character `&`).
+
+// Shouldn't take ownership
+fn get_char(data: &String) -> char {
+    data.chars().last().unwrap()
+}
+
+// Should take ownership
+fn string_uppercase(mut data: String) {
+    data = data.to_uppercase();
+
+    println!("{data}");
+}
+
+fn main() {
+    let data = "Rust is great!".to_string();
+
+    get_char(&data);
+
+    string_uppercase(data);
+}