MCP server config now expands ${VAR} environment variable references
and ~/ home directory prefix in command, args, and url fields. Previously
these values were passed verbatim to execve/URL-parse, causing silent
"No such file or directory" failures for standard config patterns.
Generated with https://github.com/Yeachan-Heo/gajae-code
Co-authored-by: Gajae Code <dev@gajae-code.com>