feat(solutions): add is-prime-number/rust/function

challenges/is-prime-number/solutions/rust/function/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "rust_application"
+version = "1.0.0"

challenges/is-prime-number/solutions/rust/function/Cargo.toml

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+[package]
+name = "rust_application"
+version = "1.0.0"
+edition = "2021"
+
+[dependencies]

challenges/is-prime-number/solutions/rust/function/README.md

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+# is-prime-number/rust/function
+
+Created by [@Divlo](https://github.com/Divlo) on 29 December 2022.

challenges/is-prime-number/solutions/rust/function/src/main.rs

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+use std::io;
+
+fn is_prime_number(number: u32) -> bool {
+    for iteration in 2..number {
+        if number % iteration == 0 {
+            return false;
+        }
+    }
+    return true;
+}
+
+fn main() {
+    let mut number = String::new();
+    io::stdin()
+        .read_line(&mut number)
+        .expect("Failed to read `stdin` line.");
+    let number: u32 = number.trim().parse().expect("Please type a number!");
+    println!("{}", is_prime_number(number));
+}