Update documentation to match latest source code structure

[Copilot]

RST autodoc files and markdown guides had drifted significantly from the actual codebase — wrong module paths, missing modules, and deleted files still referenced.

RST autodoc: fixed broken module references

• Renamed camel.runtime.rst → camel.runtimes.rst and camel.data_collector.rst → camel.data_collectors.rst (packages are plural)
• Replaced non-existent camel.datasets.base, camel.environments.base, camel.toolkits.dalle_toolkit with actual modules
• Fixed swapped qdrant/tidb automodule directives in camel.storages.vectordb_storages.rst

RST autodoc: added ~100+ missing modules

• Updated 17 RST files across agents, models, toolkits, configs, embeddings, loaders, retrievers, interpreters, storages, societies, benchmarks, verifiers, prompts, extractors, utils, types
• Created new RST files for evol_instruct, hybrid_browser_toolkit, runtimes.utils subpackages
• Added 11 missing packages to camel.rst toctree (benchmarks, bots, data_collectors, datahubs, datasets, environments, extractors, personas, runtimes, schemas, verifiers)

Markdown docs: fixed incorrect imports

• storages.md: SurrealStorage not exported from camel.storages, fixed to import from camel.storages.vectordb_storages
• camel_agents_as_an_mcp_clients.md: ModelFactory imported from camel.types → camel.models
• camel_agents_as_an_mcp_clients.md: PulseMCPSearchToolkit imported from non-existent camel.toolkits.mcp → camel.toolkits
• runtimes.md: link text said examples/runtime but URL pointed to examples/runtimes
• index.rst: referenced benchmark.md (lowercase) but file is Benchmark.md

Reference docs cleanup

• Fixed module path anchors in file_write_toolkit, imap_toolkit, openai_image_toolkit reference docs
• Removed 6 reference docs for modules that no longer exist (hybrid_browser_toolkit sub-modules moved to TS, non_visual_browser_toolkit deleted)

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