Adds a new command `/core:status` to display the status of all repositories in a formatted table.
The command provides the following features:
- Displays module name, branch, clean/dirty status, and ahead/behind counts.
- Supports filtering for dirty repositories with the `--dirty` flag.
- Supports filtering for repositories behind remote with the `--behind` flag.
- Includes a summary line with counts of dirty, behind, and clean repositories.
This is implemented by wrapping the existing `core dev health` command with a new script that handles formatting and filtering.
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