improvement: introduce direnv .envrc and update gitignore accordingly #5223
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☕️ Reasoning
Direnv is a really neat tool to use the existing flake.nix to automatically load the development shell once you enter the root or any of the subdirectories.
🧢 Changes
.envrc (tells direnv to use the flake to build the nix-shell-env)
.gitignore (do not commit the packages that are used to build the env)