Set up initial Rust project structure with Cargo, update build workflow, and modify .gitignore

Author: Fritzoid

.github/workflows/build.yml

@@ -1,9 +1,8 @@
 name: Build and Test
 
 on:
-  pull_request:
-    branches:
-      - '**'
+  branches:
+    - main
 
 jobs:
   build:

.gitignore

@@ -18,4 +18,8 @@ Cargo.lock
 #  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-#.idea/
+#.idea/
+
+# Added by cargo
+
+/target

Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "rust-dsa"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}