chore: add Quartus Prime Lite toolchain via nix flake in devbox

nix/flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1792773339,
+        "narHash": "sha256-rZLrzrC6i+jnTAlvPZHogKDulY7WWDEv9hJeHieO7Zw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "3ec636362e1816bc2f0888fa0fa2c69f1bc9e504",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

nix/flake.nix

@@ -0,0 +1,21 @@
+{
+  description = "STRIX FPGA toolchain";
+
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+
+  outputs = { nixpkgs, ... }:
+    let
+      # Quartus is unfree (free of charge, proprietary) and only built for x86_64-linux.
+      pkgs = import nixpkgs {
+        system = "x86_64-linux";
+        config.allowUnfree = true;
+      };
+    in
+    {
+      # Only the Vidor's FPGA family; Questa is dropped in favour of open-source simulators.
+      packages.x86_64-linux.quartus = pkgs.quartus-prime-lite.override {
+        supportedDevices = [ "Cyclone 10 LP" ];
+        withQuesta = false;
+      };
+    };
+}