[simoncrypta]

Summary

Bump manifest.json, the CLI version default, and README install references to v0.13.0.

Stacked above #48 (Portable Shep), #47 (persistent Shep view), and #46 (OpenClaw notifications). No product code changes in this layer.

Verification

• All 39 test scripts passed in the checkout.
• Built and unpacked the release archive. It contains Shep instructions, identity, Pi inbox extension, Herdr layout, keys, and all five mods.
• Packaged dry-run includes deployment of those assets. All five archived mods pass herdr-app check.
• Repository verification reports only the four baseline failures documented in AGENTS.md. Shellcheck reports pre-existing warnings in lib/common.sh.

This PR prepares the release only. No release tag or GitHub Release has been published.

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