feat: migrate to pnpm, add dev flake

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -9,3 +9,8 @@ node_modules
 docs
 
 .parcel-cache
+
+# nix
+.direnv
+/result
+/result-*

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1744932701,
+        "narHash": "sha256-fusHbZCyv126cyArUwwKrLdCkgVAIaa/fQJYFlCEqiU=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "b024ced1aac25639f8ca8fdfc2f8c4fbd66c48ef",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,45 @@
+{
+  description = "Svelte on Solana Wallet Adapter";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+  };
+
+  outputs =
+    { self, nixpkgs }:
+    let
+      supportedSystems = [
+        "x86_64-linux"
+        "aarch64-linux"
+        "x86_64-darwin"
+        "aarch64-darwin"
+      ];
+
+      forEachSupportedSystem =
+        f:
+        nixpkgs.lib.genAttrs supportedSystems (
+          system:
+          let
+            pkgs = import nixpkgs {
+              inherit system;
+            };
+          in
+          f {
+            inherit pkgs;
+          }
+        );
+    in
+    {
+      devShells = forEachSupportedSystem (
+        { pkgs, ... }:
+        {
+          default = pkgs.mkShell {
+            nativeBuildInputs = [
+              pkgs.pnpm
+              pkgs.nodejs
+            ];
+          };
+        }
+      );
+    };
+}

package.json

@@ -25,6 +25,7 @@
         "access": "public"
     },
     "scripts": {
+        "preinstall": "npx only-allow pnpm",
         "clean": "lerna run clean",
         "build": "lerna run build",
         "test": "lerna run test",

pnpm-workspace.yaml

@@ -0,0 +1,2 @@
+packages:
+  - 'packages/**'