major refactor (treewide amongst general cleaning based on my modified dots (with help from notashelf) - perks 1: it works

.github/workflows/check.yml

@@ -0,0 +1,23 @@
+name: Check Flake
+
+on:
+  workflow_dispatch:
+  pull_request:
+    paths:
+      - "**.nix"
+      - "**.lock"
+      - ".github/workflows/check.yml"
+  push:
+    paths:
+      - "**.nix"
+      - "**.lock"
+      - ".github/workflows/check.yml"
+
+jobs:
+  check:
+    # uses the local reusable workflow
+    uses: ./.github/workflows/nix.yml
+    secrets:
+      GH_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+    with:
+      command: nix flake check --accept-flake-config

.github/workflows/nix.yml

@@ -0,0 +1,33 @@
+name: Nix Setup
+
+on:
+  workflow_call:
+    inputs:
+      command:
+        required: false
+        type: string
+      platform:
+        default: "ubuntu"
+        required: false
+        type: string
+    secrets:
+      GH_TOKEN:
+        required: true
+
+jobs:
+  nix:
+    runs-on: "${{ inputs.platform }}-latest"
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          token: "${{ secrets.GH_TOKEN }}"
+
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+
+      - name: Nix Magic Cache
+        uses: DeterminateSystems/magic-nix-cache-action@main
+
+      - name: "Run Input: ${{ inputs.command }}"
+        run: "${{ inputs.command }}"