rig-core-v0.4.0

Added

• (gemini) move system prompt to correct request field
• (provider-gemini) add support for gemini specific completion parameters
• (provider-gemini) add agent support in client
• (provider-gemini) add gemini embedding support
• (provider-gemini) add gemini support for basic completion
• (provider-gemini) add gemini API client

Fixed

• (gemini) issue when additionnal param is empty
• docs imports and refs
• (gemini) missing param to be marked as optional in completion res

Other

• Cargo fmt
• Add module level docs for the tool module
• Fix loaders module docs references
• Add docstrings to loaders module
• Improve main lib docs
• Add all feature flag to rig-core
• (gemini) add utility config docstring
• (gemini) remove try_from and use serde deserialization
• Merge branch 'main' into feat/model-provider/16-add-gemini-completion-embedding-models
• (gemini) separate gemini api types module, fix pr comments
• add debug trait to embedding struct
• (gemini) add addtionnal types from the official documentation, add embeddings example
• (provider-gemini) test pre-commits
• (provider-gemini) Update readme entries, add gemini agent example