docs: align docs homepage messaging with revamped README

[thomhurst]

Follow-up to #6430 (README revamp). Brings the Docusaurus homepage in line with the README's positioning.

What changed

• Hero subtitle — sharpened from the generic "built with performance in mind" to the README's angle: compile-time discovery (not runtime reflection), source-generated + Native AOT, parallel by default, batteries-included with first-class integrations.
• WhyTUnit cards — refreshed the six cards to mirror the README's pillars:
  • Compile-Time Discovery · Compile-Time Safety (Roslyn analyzers) · Parallel by Default ([DependsOn]/[NotInParallel]/[ParallelLimiter<T>]) · Batteries Included (source-generated mocking) · First-Class Integrations (ASP.NET Core / Aspire / Playwright) · AOT & Trimming Ready.
• HomepageFeatures cards — sharpened the three descriptions to surface injectable DI fixtures, self-explaining assertion failures, and the build-time/run-time tradeoff. Code examples left intact (they already use the non-obsolete .And.Count().IsEqualTo(...) pattern).

What was intentionally left alone

• Benchmark components (BenchmarkHighlight / BenchmarkChart) already fetch latest.json — the same source the README table now consumes — so numbers stay in sync automatically. No hand-editing.

Notes

• No behavioural/library changes — docs-only.
• npm run typecheck fails on a pre-existing tsconfig.json baseUrl incompatibility (present on main), unrelated to this diff.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Qualify the no-reflection discovery claim

Projects can explicitly run in reflection mode (--reflection, TUNIT_EXECUTION_MODE=reflection, or [ReflectionMode]; see the existing reference docs and ExecutionModeHelper), and that path performs runtime reflection-based discovery/execution. This copy states unconditionally that TUnit tests are not reflected at runtime, which contradicts supported reflection-mode usage and can mislead users debugging that mode; please qualify it as the default/source-generation path instead.

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[claude]

Code review

No issues found. This is a docs-only copy change to the Docusaurus homepage (hero subtitle, WhyTUnit cards, HomepageFeatures descriptions) to align messaging with the revamped README. No source, logic, or public API changes.

Verified the technical claims referenced in the new copy against the codebase — all check out:

• Source-generated mocking: TUnit.Mocks.SourceGenerator exists.
• First-class integrations: TUnit.AspNetCore, TUnit.Aspire, TUnit.Playwright all exist.
• [DependsOn], [NotInParallel], [ParallelLimiter<T>] attributes all exist as described.
• Code examples in HomepageFeatures/index.tsx were left untouched and already use the non-obsolete assertion syntax, as noted in the PR description.

No CLAUDE.md compliance issues (this repo's root CLAUDE.md rules target engine/source-generator/reflection code, snapshot testing, and AOT — none apply to this docs-only diff).