Merge pull request #23 from uttarayan21/switch-cmake-upstream

feat: Replace cmake with upstream version and update all crates and nixpkgs

Author: CeNiEi

.envrc

@@ -1 +1,2 @@
 use flake
+dotenv

.github/workflows/build.yaml

@@ -62,7 +62,7 @@ jobs:
       run: nix build .#checks.x86_64-linux.mnn-llvm-cov
 
     - name: Upload coverage reports to Codecov
-      uses: codecov/codecov-action@v4.0.1
+      uses: codecov/codecov-action@v5.4.3
       with:
         flags: unittests
         name: codecov-mnn