⚙ .env ↔ JSON Converter

.env → JSON: handles export KEY=value, single- and double-quoted values (double-quoted values support \n/\t/\"/\\ escapes), # full-line and trailing comments, and blank lines. Values are always kept as JSON strings — that's what an environment variable actually is, even if it looks like a number or a boolean. JSON → .env: expects a flat JSON object; values with spaces, quotes, # or other shell-special characters are automatically double-quoted and escaped.