Add Nix and environment configuration files

- Created `.envrc` for Direnv integration to manage Nix environment.
- Added `.gitignore` to exclude build artifacts and IDE files.
- Introduced `flake.nix` for Nix flake configuration and development shell setup.
- Generated `flake.lock` to lock dependencies for the Nix environment.
- Updated `go.mod` to specify Go version 1.23.
- Added `README.md` with project overview, development instructions, and troubleshooting tips.

.gitignore

@@ -0,0 +1,34 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+
+# Nix
+result
+result-*
+.direnv/
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db
+