feat: bump to `@guidebooks/store@8`

[starpit]

BREAKING CHANGE: this pulls in new apis for the multi-cluster app dispatcher

It also pulls in torchx 0.6.0 (was 0.5.0)

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What changes have been made

Verification steps

Checks

• [ ] I've made sure the tests are passing.
• Testing Strategy
  • [ ] Unit tests
  • [ ] Manual tests
  • [ ] Testing is not required for this change

[starpit]

nvm, we will also need to adjust to the breaking API changes