Install optional dependencies on docs generation

[PiotrWodecki]

Description

Fixes an issue where docs generation needs the newly added optional Gemini dependency.

Documentation impact

• Documentation update required
• Documentation updated in another PR
• No documentation update required

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to
  not work as expected)

[Copilot]

Pull request overview

This PR fixes a documentation generation failure by ensuring optional dependencies (specifically the Gemini integration) are installed during the docs build process. The fishjam/integrations/gemini.py module requires the google-genai package, which is defined as an optional dependency. When pdoc attempts to generate documentation, it imports all modules including this integration, causing the build to fail without the optional dependencies.

• Updates both documentation workflow files to install all extras and dev dependencies
• Aligns the documentation workflows with the existing CI workflow pattern

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
.github/workflows/tag_docs.yml	Adds --all-extras --dev --all-packages flags to uv sync command to install optional dependencies needed for docs generation
.github/workflows/main_docs.yml	Adds --all-extras --dev --all-packages flags to uv sync command to install optional dependencies needed for docs generation

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