docs: replace Discord links with Slack community invite

[NiveditJain]

Summary

• Replace Discord badge in README with Slack badge pointing to the new Slack community invite link
• Update Mintlify docs nav anchor from Discord to Slack (text, URL, and icon)

Test plan

• Verify no Discord references remain in README.md and docs/docs.json
• Confirm the Slack badge renders correctly on the README
• Confirm docs/docs.json is valid JSON and the Slack icon renders in the Mintlify docs nav

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Updated community invite links and badges from Discord to Slack across documentation and platform navigation, directing users to the new community workspace.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 34d508f3-9fa3-4d52-b529-19a61e1bab4a

📥 Commits

Reviewing files that changed from the base of the PR and between 2854d4e and 56206dc.

📒 Files selected for processing (2)

• README.md
• docs/docs.json

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📝 Walkthrough

Walkthrough

The pull request updates community links across two files, replacing Discord with Slack as the primary community platform. Both the README badge/link and the documentation navigation configuration point to the new Slack workspace invite URL.

Changes

Cohort / File(s)	Summary
Community Link Updates README.md, docs/docs.json	Replaced Discord community references with Slack. Updated badge image, link text, and invite URLs. Changed navigation icon from discord to slack.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 Hop, hop, hooray! Our community hops to Slack today,
From Discord's halls to Slack's bright way,
New links spring forth with colors bright,
The warren gathers, joined in sight! ✨

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch luv-87

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