V2.1.0

[mattmc3]

[v2.1.0]

• Add using: directive for loading subplugins from monorepos and local paths (eg: oh-my-zsh, prezto).
• Improve error detection: invalid bundles and conflicting pin/branch annotations are now caught during parsing and reported with line numbers. Non-fatal errors skip the offending bundle but allow the rest to load. Fatal conflicts bail immediately.
• Ensure all non-script output from antidote bundle now begins with #, making redirected output safer to source. Exit code check is preferred for verifying bundle success.
• Add zstyle ':antidote:home' dir ... as an alternative to $ANTIDOTE_HOME to configure the antidote home directory for those who prefer to only use zstyles. If both are used, $ANTIDOTE_HOME wins.
• Refactor bundle parser to use an associative matrix, improving performance and enabling richer per-bundle metadata.