added basic project config files and placeholder module

.github/workflows/ci.yml

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+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+
+env:
+  RUST_BACKTRACE: 1
+
+jobs:
+  basic-checks:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: cargo check
+      - run: >
+          rustup component add rustfmt && 
+          cargo fmt --all --check
+      - run: >
+          rustup component add clippy && 
+          cargo clippy --all-targets --all-features -- -D warnings
+  run-tests-with-miri:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: rustup +nightly component add miri
+      - run: cargo +nightly miri test

.gitignore

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+/.idea
+/target
+
+Cargo.lock

Cargo.toml

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+[package]
+name = "aarc"
+version = "0.0.1"
+edition = "2021"
+description = "Atomically updatable variants of Arc and Weak for lock-free concurrency."
+homepage = "https://github.com/aarc-rs/aarc"
+repository = "https://github.com/aarc-rs/aarc"
+license = "MIT"
+keywords = ["atomic", "arc", "thread-safe", "sync", "lock-free"]
+categories = ["concurrency", "memory-management", "data-structures", "algorithms"]

src/lib.rs

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+pub mod example1 {
+    /// The quick brown fox jumps over the lazy dog.
+    /// # Examples:
+    /// ```
+    /// assert!(true);
+    /// ```
+    pub fn say_hello() {
+        println!("hello world!");
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn test1() {
+        assert_eq!(1, 1);
+    }
+}