fix: add buildscript for contract, ci install forc

.github/workflows/rust.yml

@@ -39,6 +39,9 @@ jobs:
     steps:
     - name: Install nextest
       uses: taiki-e/install-action@nextest
+    - name: Install forc
+      run: |
+        curl https://install.fuel.network | sh
     - uses: actions/checkout@v4
     - run: rustup target add wasm32-unknown-unknown
     - name: Run tests

fuel-zkvm-primitives-test-fixtures/README.md

@@ -11,7 +11,6 @@ cargo test --lib opcodes::tests
 ## Test Counter Contract
 
 ```shell
-forc build --path src/fixtures/counter_contract
 cargo test --lib counter_contract::tests
 ```
 

fuel-zkvm-primitives-test-fixtures/build.rs

@@ -0,0 +1,10 @@
+use std::process::Command;
+
+pub fn main() {
+    Command::new("forc")
+        .arg("build")
+        .arg("--path")
+        .arg("src/fixtures/counter_contract")
+        .spawn()
+        .expect("failed to build contract");
+}