docs: add EmpirioLabs provider configuration page
Adds a configuration page for EmpirioLabs AI (an OpenAI-compatible multi-model API) under More Providers, following the existing page format (Info/Tip, YAML + deprecated JSON tabs, model table). Uses the standard openai provider with a custom apiBase, so no code changes are needed; the configuration was verified against the live API. Registered in docs.json navigation.
Summary by cubic
Add an EmpirioLabs AI configuration page showing how to use the openai provider with apiBase: https://api.empiriolabs.ai/v1, including AUTODETECT to auto-load all EmpirioLabs models. Uses "EmpirioLabs AI" as the provider display name, includes YAML and deprecated JSON examples, a popular models table with context sizes, Info/Tip callouts, and a note on the reasoning_effort request option; registered in docs.json under More Providers.