chore: Update dependencies & remove unused test (#253)

* chore: Remove unused deps with cargo-udeps

* chore: Use rust nightly in flake & remove irust

* chore: Remove unused imports & update dependencies

at least as much as possible.
There's some stuff that deeply depends on hyper 1.0, but we can't
transitively depend on that yet, because tonic doesn't support hyper 1.0
yet.

* fix: nix package (#249)

* fix: nix package

also, add workflow to check that it builds

* fix: remove build condition

* fix: naming 🙈

* chore: Remove `irust` from nix check & check other stuff

---------

Co-authored-by: James Walker <[email protected]>

Author: matheus23

Diff for: .github/workflows/nix.yml

@@ -0,0 +1,42 @@
+name: 📦 Nix Build
+
+on:
+  push:
+    branches: [main]
+
+  pull_request:
+    branches: ["**"]
+
+jobs:
+  changes:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@v9
+
+      - name: Cache Magic
+        uses: DeterminateSystems/magic-nix-cache-action@v3
+
+      - name: Check Nix flake inputs
+        uses: DeterminateSystems/flake-checker-action@v5
+        with:
+          ignore-missing-flake-lock: false
+          fail-mode: true
+
+      - name: Nix Develop Check
+        run: |
+          nix develop --show-trace -c rustc --version
+          nix develop --show-trace -c cargo deny --version
+          nix develop --show-trace -c cargo dist --version
+          nix develop --show-trace -c cargo expand --version
+          nix develop --show-trace -c cargo outdated --version
+          nix develop --show-trace -c cargo sort --version
+          nix develop --show-trace -c cargo udeps --version
+          nix develop --show-trace -c cargo watch --version
+          nix develop --show-trace -c diesel --version
+
+      - name: Nix Fission Server Build
+        run: nix build .