Add Discord icon in header

[AmanVarshney01]

Summary by CodeRabbit

• New Features

  • Added a Discord community link button in the top navigation bar for quick access to join the Prisma Discord community.

• Style

  • Enhanced navigation icon styling with improved hover effects and responsive behavior to ensure proper display across all screen sizes.

[cloudflare-workers-and-pages]

Deploying docs with    Cloudflare Pages

Latest commit:	c3eaa9b
Status:	✅  Deploy successful!
Preview URL:	https://29e290ea.docs-51g.pages.dev
Branch Preview URL:	https://dicord-header-icon.docs-51g.pages.dev

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[github-actions]

Dangerous URL check

No absolute URLs to prisma.io/docs found.
No local URLs found.

[coderabbitai]

Walkthrough

A Discord community link is added to the documentation navbar with corresponding icon styling. CSS selectors throughout the stylesheet are refactored for formatting consistency while new responsive behavior is introduced to hide header icons on smaller viewports.

Changes

Cohort / File(s)	Summary
Navbar Configuration docusaurus.config.ts	Added right-aligned Discord community link to the navbar with tracking parameters, custom styling class, and accessibility label.
Icon & Selector Styling src/css/custom.css	Added Discord icon styling with 40x40 sizing, hover effects, and transitions matching the existing GitHub icon. Refactored numerous CSS selectors (whitespace removal, combinator spacing) and added responsive rule to hide header icons below 1191px viewport width.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

The CSS changes require careful verification: while the summary indicates functional equivalence, the widespread selector refactoring—removing spaces around combinators and adjusting descendant matching patterns—introduces subtle specificity shifts that could affect element matching behavior. Each selector variant needs validation to confirm no unintended styling regressions occur, particularly with the responsive breakpoint addition.

🚥 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 accurately reflects the main change: adding a Discord icon to the documentation site header, supported by changes in both docusaurus.config.ts and src/css/custom.css.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[github-actions]

Redirect check

This PR probably requires the following redirects to be added to static/_redirects:

• This PR does not change any pages in a way that would require a redirect.

[github-actions]

🍈 Lychee Link Check Report

Note: Links are cached for 5 minutes. Failed links (timeouts, rate limits) are retried in a second run with longer timeout.

📊 Results Overview

Status	Count
🔍 Total	2310
✅ Successful	2280
⏳ Timeouts	0
🔀 Redirected	4
👻 Excluded	24
❓ Unknown	0
🚫 Errors	1
⛔ Unsupported	1

Errors per input

Errors in 250-postgres/350-integrations/200-vercel.mdx

• [404] https://vercel.com/templates/nuxt/postgres-nuxt | Error (cached)