docs(kilo-docs): update DoltHub Wasteland auth docs

[jeanduplessis]

Summary

Gas Town Wasteland docs now describe DoltHub OAuth as the default auth path while keeping the advanced API token option documented.

Why this change is needed

Wasteland docs previously told users to create and paste a DoltHub token as the main setup path. The product now supports DoltHub through Kilo Integrations, and the current Wasteland dialog uses the connected DoltHub account by default while still supporting API tokens under Advanced.

How this is addressed

• Updates Wasteland quick start, settings, concepts, workflow, and admin docs to describe OAuth through Kilo Integrations as the default.
• Documents the advanced DoltHub API token path for setups that cannot use OAuth.
• Adds screenshots for DoltHub integration setup and the Wasteland credentials dialog.
• Removes the stale Wasteland connect screenshot that only showed token-based setup.
• Updates Kilo Connect and Integrations docs so DoltHub auth guidance matches the Wasteland flow.

Human Verification

• bun run test
• bun run build
• Checked affected docs pages in browser against local dev server.

Reviewer Notes

Human Reviewer Flags

• Advanced API token setup remains documented as a fallback because the Wasteland dialog still supports it. OAuth through Kilo Integrations is presented as the default path.

Code Reviewer Agent

Code Reviewer Notes

• Docs use /docs/img/... paths for added screenshots, matching Markdoc image requirements.
• bun run build passed and verified new image references during static generation.
• Existing build warning remains for /customize/custom-modes page-data size.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (12 files)

• packages/kilo-docs/pages/automate/integrations.md
• packages/kilo-docs/pages/code-with-ai/gastown/wasteland/admin.md
• packages/kilo-docs/pages/code-with-ai/gastown/wasteland/concepts.md
• packages/kilo-docs/pages/code-with-ai/gastown/wasteland/quick-start.md
• packages/kilo-docs/pages/code-with-ai/gastown/wasteland/settings.md
• packages/kilo-docs/pages/code-with-ai/gastown/wasteland/workflow.md
• packages/kilo-docs/pages/code-with-ai/platforms/kilo-connect.md
• packages/kilo-docs/public/img/gastown/wasteland/dolthub-credentials-dialog.png
• packages/kilo-docs/public/img/gastown/wasteland/gt-wasteland-connect-dialog.png
• packages/kilo-docs/public/img/integrations/dolthub/authorize.png
• packages/kilo-docs/public/img/integrations/dolthub/connect.png
• packages/kilo-docs/public/img/integrations/dolthub/connected.png

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_{Review guidance: REVIEW.md from base branch main}