v15.4.0-canary.84

Misc Changes

• docs: fix typo: #80549
• Fix small grammar error in searchParams section: #80548
• docs: fix a typo in static-exports.mdx: #80541
• docs: fix typos: #80503
• docs: fix typo: #80500
• docs: fix typo: #80501
• Docs IA 2.0: Delete routing section, add BFF guide, polish getting started: #80365
• Turbopack Build: Refactor browserslist CSS test to not use .next folder: #80571
• Explain how to use searchParams prop: #80579
• Update Turbopack development test manifest: #80563
• [turbopack] Simplify Request::parse(Pattern) the recursive portion doesn't need to be async: #80510
• Update Rspack development test manifest: #80560
• Update Rspack production test manifest: #80561
• Update Turbopack production test manifest: #80562

Credits

Huge thanks to @sajadtorkamani, @bobziroll, @lumirlumir, @delbaoliveira, @timneutkens, @gaearon, and @lukesandberg for helping!