Use hello-world instead of increment as default contract

cmd/soroban-cli/src/utils/contract-init-template/contracts/hello_world/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "soroban-hello-world-contract"
+version = "0.0.0"
+authors = ["Stellar Development Foundation <info@stellar.org>"]
+license = "Apache-2.0"
+edition = "2021"
+rust-version = "1.74.0"
+publish = false
+
+[lib]
+crate-type = ["cdylib"]
+doctest = false
+
+[dependencies]
+soroban-sdk = { workspace = true }
+
+[dev_dependencies]
+soroban-sdk = { workspace = true }

cmd/soroban-cli/src/utils/contract-init-template/contracts/hello_world/src/lib.rs

@@ -0,0 +1,14 @@
+#![no_std]
+use soroban_sdk::{contract, contractimpl, symbol_short, vec, Env, Symbol, Vec};
+
+#[contract]
+pub struct HelloContract;
+
+#[contractimpl]
+impl HelloContract {
+    pub fn hello(env: Env, to: Symbol) -> Vec<Symbol> {
+        vec![&env, symbol_short!("Hello"), to]
+    }
+}
+
+mod test;

cmd/soroban-cli/src/utils/contract-init-template/contracts/hello_world/src/test.rs

@@ -0,0 +1,17 @@
+#![cfg(test)]
+
+use super::*;
+use soroban_sdk::{symbol_short, vec, Env};
+
+#[test]
+fn test() {
+    let env = Env::default();
+    let contract_id = env.register_contract(None, HelloContract);
+    let client = HelloContractClient::new(&env, &contract_id);
+
+    let words = client.hello(&symbol_short!("Dev"));
+    assert_eq!(
+        words,
+        vec![&env, symbol_short!("Hello"), symbol_short!("Dev"),]
+    );
+}