improvement(development): Add nix-direnv integration

So as to automatically open a nix devShell for those who use direnv/want to use direnv to make their lives more automated.

Author: x10an14

.envrc

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+# Automatically Load nix devShell w/dotenv
+use flake

.gitignore

@@ -12,6 +12,7 @@ rust-project.json
 *.iml
 *.o
 public/
+.direnv/
 
 # Local Netlify folder
 .netlify