chore(infra): add nightly ci

.github/workflows/nightly.yaml

@@ -0,0 +1,18 @@
+name: Nightly Build
+
+on:
+  schedule:
+    - cron: '0 0 * * *'  # Runs at midnight UTC every day
+  workflow_dispatch:  # Allows manual triggering
+
+jobs:
+  run-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: nightly-2025-01-02
+      - uses: Swatinem/rust-cache@v2
+      - name: Run tests
+        run: cargo test --features="nightly"

crates/air_utils/Cargo.toml

@@ -12,3 +12,9 @@ stwo-air-utils-derive = { path = "../air_utils_derive" }
 
 [lib]
 bench = false
+
+# Define Nightly features in order to allow selective tests
+# Use the following #[cfg(feature = "nightly")]
+# to enable nightly features on specific tests.
+[features]
+nightly = []

crates/air_utils_derive/Cargo.toml

@@ -11,3 +11,9 @@ syn = "2.0.90"
 quote = "1.0.37"
 itertools = "0.13.0"
 proc-macro2 = "1.0.92"
+
+# Define Nightly features in order to allow selective tests
+# Use the following #[cfg(feature = "nightly")]
+# to enable nightly features on specific tests.
+[features]
+nightly = []

crates/prover/Cargo.toml

@@ -6,6 +6,11 @@ edition.workspace = true
 [features]
 parallel = ["rayon"]
 slow-tests = []
+# Define Nightly features in order to allow selective tests
+# Use the following #[cfg(feature = "nightly")]
+# to enable nightly features on specific tests.
+nightly = []
+
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html