chore: cargo init and flake init

Author: nilp0inter

.envrc

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+use flake

.gitignore

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+/target
+.direnv

Cargo.lock

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+[package]
+name = "treehouse"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

Cargo.toml

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+{
+  description = "Minimal rust wasm32-unknown-unknown example";
+
+  inputs = {
+    flake-utils.url = "github:numtide/flake-utils";
+    nixpkgs.url = "nixpkgs/nixos-22.11";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let pkgs = import nixpkgs { inherit system; }; in
+      {
+        defaultPackage = pkgs.rustPlatform.buildRustPackage {
+          pname = "treehouse";
+          version = "0.1.0";
+          src = ./.;
+
+          cargoLock = {
+            lockFile = ./Cargo.lock;
+          };
+        };
+      }
+    );
+}

flake.lock

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+fn main() {
+    println!("Hello, world!");
+}