feat: added palindrome checker

examples/cairo/scripts/palindrome/.gitignore

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+target
+

examples/cairo/scripts/palindrome/.tool-versions

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+scarb 2.11.3 (15764158b 2025-03-13)
+cairo: 2.11.2 (https://crates.io/crates/cairo-lang-compiler/2.11.2)
+sierra: 1.7.0

examples/cairo/scripts/palindrome/Scarb.lock

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+# Code generated by scarb DO NOT EDIT.
+version = 1
+
+[[package]]
+name = "palindrome"
+version = "0.1.0"

examples/cairo/scripts/palindrome/Scarb.toml

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+[package]
+name = "palindrome"
+version = "0.1.0"
+edition = "2024_07"
+
+# See more keys and their definitions at https://docs.swmansion.com/scarb/docs/reference/manifest.html
+
+[dependencies]

examples/cairo/scripts/palindrome/snfoundry.toml

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+# Visit https://foundry-rs.github.io/starknet-foundry/appendix/snfoundry-toml.html
+# and https://foundry-rs.github.io/starknet-foundry/projects/configuration.html for more information
+
+# [sncast.default]                                         # Define a profile name
+# url = "https://free-rpc.nethermind.io/sepolia-juno/v0_7" # Url of the RPC provider
+# accounts-file = "../account-file"                        # Path to the file with the account data
+# account = "mainuser"                                     # Account from `accounts_file` or default account file that will be used for the transactions
+# keystore = "~/keystore"                                  # Path to the keystore file
+# wait-params = { timeout = 300, retry-interval = 10 }     # Wait for submitted transaction parameters
+# block-explorer = "StarkScan"                             # Block explorer service used to display links to transaction details
+# show-explorer-links = true                               # Print links pointing to pages with transaction details in the chosen block explorer

examples/cairo/scripts/palindrome/src/lib.cairo

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+mod palindrome_checker;

examples/cairo/scripts/palindrome/src/palindrome_checker.cairo

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+fn palindrome_checker(word: ByteArray) -> bool {
+
+    let mut i:u32 = word.len();
+    let mut u:u32 = 0;
+    let mut flag:bool = false;
+
+    while i > 0 {
+
+        i -= 1;
+
+        if word.at(u).unwrap() != word.at(i).unwrap() {
+            flag = false;
+            break;
+        }else{
+            flag = true;
+            u += 1;
+        }
+    }
+
+    flag
+}
+
+fn main(){
+
+    println!("Palindromes \n");
+    let pal_word_1 = "anna";
+    let pal_word_2 = "dewed";
+    println!("The word {} is palindrome - [{}]",pal_word_1, palindrome_checker(pal_word_1));
+    println!("The word {} is palindrome - [{}]",pal_word_2, palindrome_checker(pal_word_2));
+
+
+    println!("\nNot palindromes \n");
+    let pal_word_1 = "taco";
+    let pal_word_2 = "mother";
+    println!("The word {} is not palindrome - [{}]",pal_word_1, palindrome_checker(pal_word_1));
+    println!("The word {} is not palindrome - [{}]",pal_word_2, palindrome_checker(pal_word_2));
+
+}