Create initial direnv+flake config with GCC

.envrc

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+use flake

.gitignore

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+.direnv

flake.lock

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+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1760878510,
+        "narHash": "sha256-K5Osef2qexezUfs0alLvZ7nQFTGS9DL2oTVsIXsqLgs=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "5e2a59a5b1a82f89f2c7e598302a9cacebb72a67",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  description = "C++/TypeScript Dev environment for methylphenidate";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+  };
+
+  outputs = { self, nixpkgs }: 
+    let
+      system = "x86_64-linux";
+      pkgs = import nixpkgs { inherit system; };
+    in {
+      devShells.x86_64-linux.default = pkgs.mkShell {
+        buildInputs = with pkgs; [
+          libgcc
+        ];
+        shellHook = ''
+          echo "Welcome to the methylphenidate dev environment!"
+        '';
+      };
+    };
+}