Add GitHub workflows for Dead Nix Analysis, Flake Checker, and Flake …

…Lock Updater

.github/workflows/deadnix.yml

@@ -0,0 +1,16 @@
+name: Dead 😵 Nix ❄️ Analysis 🔍️
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  deadnix:
+    name: Dead Nix Analysis
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@v9
+      - uses: DeterminateSystems/magic-nix-cache-action@v3
+      - uses: astro/deadnix-action@v1

.github/workflows/flake-checker.yml

@@ -0,0 +1,22 @@
+name: Flake ❄️ Checker ✅
+
+on:
+  push:
+    branches:
+      - main
+  schedule:
+    # l33t o'clock
+    - cron: '37 13 * * *'
+  workflow_dispatch:
+
+jobs:
+  flake-checker:
+    name: Flake Checker
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: DeterminateSystems/nix-installer-action@v9
+      - uses: DeterminateSystems/magic-nix-cache-action@v3
+      - uses: DeterminateSystems/flake-checker-action@v5

.github/workflows/lock-updater.yml

@@ -0,0 +1,25 @@
+name: Flake ❄️ Lock 🔒️ Updater ✨
+
+on:
+  schedule:
+    # Pi o'clock
+    - cron: '3 14 * * 1,5'
+  workflow_dispatch:
+
+jobs:
+  lock-updater:
+    name: Flake Lock Updater
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: DeterminateSystems/nix-installer-action@v9
+      - uses: DeterminateSystems/magic-nix-cache-action@v3
+      - uses: DeterminateSystems/update-flake-lock@v21
+        with:
+          pr-title: "chore: update flake.lock"
+          # Labels to be set on the PR
+          pr-labels: |
+            dependencies
+            automated