Replace slog with stdout for CLI output

[Copilot]

CLI tools should output plain text to stdout, not structured logs. This change removes log/slog in favor of fmt.Fprintf(os.Stdout, ...) for informational messages.

Changes:

• Removed log/slog import
• Replaced 4 slog.Info() calls with fmt.Fprintf(os.Stdout, ...)

Before:

slog.Info("Including memory file", "path", path)

After:

fmt.Fprintf(os.Stdout, "Including memory file: %s\n", path)

Messages now print as readable text instead of structured log entries.

Original prompt

This is a CLI tool, lets just print to stdout, don't use slog.

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