v0.7.0-rc

Changelog:

• ⚠️ Protocol breaking changes (i.e. no interop with previous versions):
  • New protocol version: 0.7
• New features:
  • Adopt C-style idiomatic for error returns. #132
• New unstable features:

  🔬 Unstable
  This following features are unstable: they work as advertised, but their API may change in a future release.

  • Query payload. #130
    • RFC: https://github.com/eclipse-zenoh/roadmap/blob/main/rfcs/ALL/Query%20Payload.md
  • Partially exposure of errors in the User API
• Bug fixes:
  • Additional validations while parsing locators
  • uin64_t random generation
  • Force multicast to use the configured interface #107
• Other changes:
  • Optimizations in terms of speed and stack usage.
  • Queryables are declared as complete: false by default. #131
  • MISRA-C compliance. #124
  • Fix README. #133 (Thanks @bryceschober )