feat(codegen): add pagination, offset, and field selection to CLI list commands

- Parse --limit, --offset, --fields flags in generated handleList handlers
- Use buildSelectFromPaths utility for custom field projection
- Build findManyArgs with conditional spread for first/offset pagination
- Update MCP tool schemas with limit/offset/fields input properties
- Update skill docs with pagination and field selection examples
- Update usage text to document new list options

Author: pyramation