feat: add interactive mode to schema-refine command

Added --interactive/-i flag to schema-refine command that allows users to
review and approve each refinement individually:

- Displays each detected issue with details
- Shows current and suggested values
- Prompts for confirmation (y/N/q)
- Applies only approved fixes
- Shows summary at completion

This gives users fine-grained control over which refinements to apply.

Example usage:
  markitect schema-refine schema.json --interactive

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

markitect/cli.py

@@ -1912,9 +1912,11 @@ def schema_analyze_cmd(config, schema_file, verbose):
               help='Migrate deprecated extensions (requires manual review)')
 @click.option('--dry-run', is_flag=True,
               help='Show changes without applying them')
+@click.option('--interactive', '-i', is_flag=True,
+              help='Prompt for each refinement interactively')
 @pass_config
 def schema_refine_cmd(config, schema_file, output, loosen_counts, no_loosen_counts,
-                      round_numbers, no_round_numbers, migrate_deprecated, dry_run):
+                      round_numbers, no_round_numbers, migrate_deprecated, dry_run, interactive):
     """
     Refine a schema by automatically applying fixes for rigidity issues.
 
@@ -1933,6 +1935,9 @@ def schema_refine_cmd(config, schema_file, output, loosen_counts, no_loosen_coun
         # Preview changes without applying
         markitect schema-refine schema.json --dry-run
 
+        # Review each fix interactively
+        markitect schema-refine schema.json --interactive
+
         # Save refined schema to new file
         markitect schema-refine schema.json --output refined-schema.json
 
@@ -1951,7 +1956,8 @@ def schema_refine_cmd(config, schema_file, output, loosen_counts, no_loosen_coun
         loosen_counts=loosen,
         migrate_deprecated=migrate_deprecated,
         round_numbers=round_nums,
-        dry_run=dry_run
+        dry_run=dry_run,
+        interactive=interactive
     ))