docs: add missing optional packages in install.md (#2412)

Author: Kludex

docs/install.md

@@ -50,12 +50,18 @@ pip/uv-add "pydantic-ai-slim[openai]"
 * `evals` — installs [`pydantic-evals`](evals.md) [PyPI ↗](https://pypi.org/project/pydantic-evals){:target="_blank"}
 * `openai` — installs `openai` [PyPI ↗](https://pypi.org/project/openai){:target="_blank"}
 * `vertexai` — installs `google-auth` [PyPI ↗](https://pypi.org/project/google-auth){:target="_blank"} and `requests` [PyPI ↗](https://pypi.org/project/requests){:target="_blank"}
+* `google` — installs `google-genai` [PyPI ↗](https://pypi.org/project/google-genai){:target="_blank"}
 * `anthropic` — installs `anthropic` [PyPI ↗](https://pypi.org/project/anthropic){:target="_blank"}
 * `groq` — installs `groq` [PyPI ↗](https://pypi.org/project/groq){:target="_blank"}
 * `mistral` — installs `mistralai` [PyPI ↗](https://pypi.org/project/mistralai){:target="_blank"}
 * `cohere` - installs `cohere` [PyPI ↗](https://pypi.org/project/cohere){:target="_blank"}
+* `bedrock` - installs `boto3` [PyPI ↗](https://pypi.org/project/boto3){:target="_blank"}
+* `huggingface` - installs `huggingface-hub[inference]` [PyPI ↗](https://pypi.org/project/huggingface-hub){:target="_blank"}
 * `duckduckgo` - installs `ddgs` [PyPI ↗](https://pypi.org/project/ddgs){:target="_blank"}
 * `tavily` - installs `tavily-python` [PyPI ↗](https://pypi.org/project/tavily-python){:target="_blank"}
+* `cli` - installs `rich` [PyPI ↗](https://pypi.org/project/rich){:target="_blank"}, `prompt-toolkit` [PyPI ↗](https://pypi.org/project/prompt-toolkit){:target="_blank"}, and `argcomplete` [PyPI ↗](https://pypi.org/project/argcomplete){:target="_blank"}
+* `mcp` - installs `mcp` [PyPI ↗](https://pypi.org/project/mcp){:target="_blank"}
+* `a2a` - installs `fasta2a` [PyPI ↗](https://pypi.org/project/fasta2a){:target="_blank"}
 * `ag-ui` - installs `ag-ui-protocol` [PyPI ↗](https://pypi.org/project/ag-ui-protocol){:target="_blank"} and `starlette` [PyPI ↗](https://pypi.org/project/starlette){:target="_blank"}
 
 See the [models](models/index.md) documentation for information on which optional dependencies are required for each model.