feat(docs): source docs from volcano-docs and weight CLI section higher

[tkkhq]

Tracking

• Tracks: https://konghq.atlassian.net/browse/VOL-564

Problem

• volcano docs sourced only the CLI's own docs/ from the Kong/volcano-cli repo, so search never covered the broader product/platform docs
• CLI users searching the full corpus need CLI-specific docs to surface first, not get buried under product/platform pages

Summary

• change the compiled default docs source from Kong/volcano-cli /docs to Kong/volcano-docs /content in internal/docs/source.go
• add a cliTopicBoost multiplier in internal/docs/search.go so sections in the cli topic (content/cli) rank above equivalent product/platform matches
• update volcano docs command help and docs/docs-search.md to describe the new default source, the CLI weighting, and --topic cli
• update fakeDocsServer and the source-envelope assertion to the new repo/path; add TestSearchWeightsCLISectionHigher

Verification

• go build ./...
• go vet ./internal/docs/... ./internal/cmd/docs/...
• go test ./...
• token-less volcano docs sync --force against the new default: added 121 (public Kong/volcano-docs reachable with no GITHUB_TOKEN); search ranks content/cli sections first and --topic cli filters to them

[Copilot]

Pull request overview

Updates documentation search to use the full private Volcano docs corpus and prioritize CLI content.

Changes:

• Changes the default source to Kong/volcano-docs/content.
• Adds a 1.5× ranking boost for the cli topic.
• Updates tests, command help, and user documentation.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
internal/docs/source.go	Changes the compiled default docs source.
internal/docs/search.go	Adds CLI-topic score boosting.
internal/docs/search_test.go	Tests CLI ranking behavior.
internal/cmd/docs/docs.go	Updates command help for the new source.
internal/cmd/docs/docs_test.go	Updates the fake source and assertions.
docs/docs-search.md	Documents source configuration and ranking.

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