- Add aliases for status command: sign, sheet, sheet.add, drop, drop.cat
- Improve error handling with detailed localized messages for prepare,
  execute, and render phases
- Add flag aliases: -L for --lang and -R for --renderer
- Implement similar command suggestions using Levenshtein distance
- Fix command matching logic to avoid ambiguous prefix issues

The share command now supports `list`, `see`, and merging operations
with conflict resolution modes (--safe, --skip, --overwrite, --reject).
Updated help documentation in both English and Chinese locales, and
added Bash and PowerShell completion scripts.

The `md` function now handles backslash escapes for specific characters
(*, <, >, `) to allow them to be displayed literally in formatted text.
This fixes rendering of help documentation that uses these characters as
symbols.