Kalavai-client

- Validation checks when joining
- New `kalavai pool gpus `endpoint to get detailed GPU information

- Deprecated `cluster` endpoints in favour of `pool`
- References to `cluster` in the documentation have been changed to `pool`
- Fixed default flannel iface (only for public pools)

- Downgrade GCC requirement
- Fixed broken dependency

- Built generated with less strict requirements on compiler and OpenSSL

- Multiple fixes
- Public clusters

Two new functional modules:
- Aphrodite engine template for LLMs
- Ray cluster for distributed computation