docs: merge Using ColdBrew into Getting Started

[ankurs]

Summary

• Merged "Using ColdBrew" (USING.md) into "Getting Started" (quickstart.md) — the two pages had significant content overlap
• Added Configuration (env vars table) and Adding Interceptors sections to Getting Started
• Deleted USING.md
• Removed /using references from Index.md and Playwright tests

Test plan

• Playwright navigation tests pass (no /using/ page)
• Getting Started page has Configuration and Interceptors sections
• No broken links to /using/

Summary by CodeRabbit

• Documentation
  • Removed the Using ColdBrew documentation page
  • Enhanced quickstart with new Configuration section featuring common environment variables and their defaults
  • Added step-by-step guidance on registering custom interceptors with practical code examples
  • Updated navigation links throughout documentation to reflect restructured content

[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

📝 Walkthrough

Walkthrough

Documentation consolidation: the dedicated "Using ColdBrew" page (USING.md) was removed and its content migrated into the quickstart documentation. Navigation entries and tests were updated to reflect this removal.

Changes

Cohort / File(s)	Summary
Documentation Consolidation Index.md, quickstart.md, USING.md	Removed dedicated "Using ColdBrew" navigation link from Index.md; deleted USING.md entirely; added "Configuration" and "Adding Interceptors" sections to quickstart.md with environment variable table and interceptor registration example.
Test Updates tests/navigation.spec.ts	Removed /using/ page from topLevelPages test data to align with deleted documentation page.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~4 minutes

Possibly related PRs

• docs: add distributed tracing section to production deployment guide #45: Modifies the same documentation navigation entries (Index.md and quickstart.md Next Steps list) in parallel or related work.
• docs: update Prometheus interceptor package name after Phase 4 migration #40: Updates interceptor-related documentation sections, which overlaps with the new "Adding Interceptors" content introduced here.

Poem

🐰 A page consolidated, content made bright,
ColdBrew quickstart now holds the light,
Using guide merged with helpful care,
Configuration and interceptors there! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: merging content from Using ColdBrew documentation into the Getting Started guide, which aligns with the primary objective of consolidating documentation due to overlap.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/merge-using-into-quickstart

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[Copilot]

Pull request overview

This PR consolidates overlapping documentation by merging the former “Using ColdBrew” content into the “Getting Started” guide, while removing the standalone /using/ page and updating references/tests accordingly.

Changes:

• Deleted USING.md and removed /using/ links from top-level navigation entry points.
• Added “Configuration” (env var table) and “Adding Interceptors” sections to quickstart.md.
• Updated Playwright navigation tests to stop expecting /using/.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
USING.md	Removes the dedicated “Using ColdBrew” page (content moved into Getting Started).
quickstart.md	Adds configuration/env-var reference and interceptor customization guidance.
Index.md	Removes “Using ColdBrew” from Next Steps links.
tests/navigation.spec.ts	Removes /using/ from the set of expected top-level pages.

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