Improve API reference detail and coverage

[yuecideng]

Description

This PR improves the API reference documentation under .

It expands sparse module pages with clearer overviews, adds missing API references, and improves section structure/readability for RL and simulation modules.

Dependencies: None

Issue reference: N/A

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Enhancement (non-breaking change which improves an existing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (existing functionality will not work without user modification)
• Documentation update

Screenshots

N/A

Checklist

• I have run the command to format the code base.
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• Dependencies have been updated, if applicable.

Generated with Claude Code

[Copilot]

Pull request overview

This PR expands and restructures the Sphinx API reference pages for EmbodiChain to provide clearer package overviews and more complete coverage of simulation and RL subpackages.

Changes:

• Enhanced the API reference index and added missing package pages (e.g., embodichain.data, RL collector).
• Expanded lab.sim and lab.sim.utility documentation with overviews and deeper submodule/member listings.
• Improved RL package docs structure by adding overview text and dedicated pages for submodules.

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
docs/source/api_reference/index.rst	Improves top-level API reference intro and adds data to the core module listing.
docs/source/api_reference/embodichain/embodichain.utils.rst	Adds additional utils submodules to the documented submodule list.
docs/source/api_reference/embodichain/embodichain.lab.sim.utility.rst	Adds an overview and documents many utility submodules with automodule sections.
docs/source/api_reference/embodichain/embodichain.lab.sim.types.rst	Adds overview and explicit type-alias documentation via autosummary/autodata.
docs/source/api_reference/embodichain/embodichain.lab.sim.rst	Adds a package overview, expands submodule listing, and adds sections for robots/types/atomic actions.
docs/source/api_reference/embodichain/embodichain.lab.sim.robots.rst	Adds overview and class documentation for CobotMagicCfg.
docs/source/api_reference/embodichain/embodichain.data.rst	Introduces new API reference page for embodichain.data and its submodules.
docs/source/api_reference/embodichain/embodichain.agents.rst	Adds collector to the RL submodule listing.
docs/source/api_reference/embodichain/embodichain.agents.rl.utils.rst	Adds overview and expands submodule/member documentation for RL utils.
docs/source/api_reference/embodichain/embodichain.agents.rl.train.rst	Adds overview and attempts to expand function/member documentation.
docs/source/api_reference/embodichain/embodichain.agents.rl.rst	Adds overview and links/sections for collector APIs.
docs/source/api_reference/embodichain/embodichain.agents.rl.models.rst	Adds overview and attempts to expand function/member documentation.
docs/source/api_reference/embodichain/embodichain.agents.rl.collector.rst	New page documenting collector classes (BaseCollector, SyncCollector).
docs/source/api_reference/embodichain/embodichain.agents.rl.buffer.rst	Adds overview and expands buffer submodule documentation.
docs/source/api_reference/embodichain/embodichain.agents.rl.algo.rst	Adds overview and attempts to expand algorithm registry documentation.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

This page declares .. automodule:: embodichain.agents.rl.algo twice (once at the top and again with :members:). This typically duplicates rendered content and can produce Sphinx warnings. Keep only a single automodule directive (and add options to that one if needed).

[Copilot]

The .. rubric:: Functions / .. autosummary:: block is indented even though it is not inside another directive’s content. In reStructuredText this indentation makes it a block quote, which can lead to odd formatting and/or docutils warnings. Unindent these directives to column 0 (or intentionally nest them under the automodule directive, but then the Overview section would need to be structured accordingly).

[Copilot]

This page declares .. automodule:: embodichain.agents.rl.models twice (top and again with :members:). That usually duplicates output and can trigger Sphinx warnings. Prefer a single automodule directive with the desired options.

[Copilot]

The .. rubric:: Functions / .. autosummary:: block is indented even though it isn't nested under another directive. This indentation makes it a block quote in RST, which can render strangely and/or cause docutils warnings. Unindent these directives to the left margin (or restructure so they are intentionally within an automodule content block).

[Copilot]

This page declares .. automodule:: embodichain.agents.rl.train twice (once at the top and again with :members:). This can duplicate rendered content and may raise Sphinx warnings. Keep a single automodule directive and attach the desired options to it.

[Copilot]

The .. rubric:: Functions / .. autosummary:: block is indented but not actually inside another directive’s content. In RST this becomes a block quote and can lead to incorrect rendering/warnings. Unindent these directives to column 0 (or explicitly nest them under an automodule directive and adjust surrounding structure).