#7051: Add io-intelligence model inference provider

- Adds iointelligence from ionet as inference provider in OpenClaw <!-- greptile_comment --> <h2>Greptile Overview</h2> <h3>Greptile Summary</h3> This PR adds a new `io-intelligence` inference provider: it wires up env var resolution (`IO_INTELLIGENCE_API_KEY`), adds an implicit provider config with OpenAI-compatible base URL and a small model catalog, and extends the onboarding/auth-choice flow and docs to support selecting IO Intelligence and setting it as the default model. The integration follows existing provider patterns (provider config in `src/agents/models-config.providers.ts`, onboarding config helpers in `src/commands/onboard-auth.config-core.ts`, and new auth-choice option/group in `src/commands/auth-choice-options.ts`). Main concern: the new `ioIntelligenceApiKey` option and documented `--io-intelligence-api-key` flag don’t appear to be wired into the onboarding logic, so the non-interactive CLI path may not actually persist credentials/config as documented. <h3>Confidence Score: 3/5</h3> - This PR is mostly safe to merge, but the io-intelligence non-interactive onboarding flag path looks broken/incomplete. - Core provider wiring (env var mapping, implicit provider config, auth-choice handling) is consistent with existing patterns, but the new `ioIntelligenceApiKey` option appears unused and docs reference a `--io-intelligence-api-key` CLI flag that likely won’t work, which will frustrate users and break advertised setup flows. - src/commands/onboard-types.ts, docs/providers/io-intelligence.md, and wherever onboard CLI flags are parsed/applied <!-- greptile_other_comments_section --> _{(2/5) Greptile learns from your feedback when you react with thumbs up/down!} **Context used:** - Context from `dashboard` - CLAUDE.md ([source](https://app.greptile.com/review/custom-context?memory=fd949e91-5c3a-4ab5-90a1-cbe184fd6ce8)) - Context from `dashboard` - AGENTS.md ([source](https://app.greptile.com/review/custom-context?memory=0d0c8278-ef8e-4d6c-ab21-f5527e322f13)) <!-- /greptile_comment -->