chore: add rust-toolchain.toml

Author: merceyz

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
             ~/.cargo/registry/cache/
             ~/.cargo/git/db/
             parser/target/
-          key: ${{ runner.os }}-cargo-v1-${{ hashFiles('**/Cargo.lock') }}
+          key: ${{ runner.os }}-cargo-v2-${{ hashFiles('**/rust-toolchain.toml') }}-${{ hashFiles('**/Cargo.lock') }}
           restore-keys: |
             ${{ runner.os }}-cargo-
 

parser/rust-toolchain.toml

@@ -0,0 +1,4 @@
+[toolchain]
+channel = "1.81.0"
+targets = ["wasm32-unknown-unknown"]
+components = ["rustfmt", "clippy"]