run-gatsby.js fails on Windows when using pnpm/bun (missing gatsby.cmd) #8143

Description

The scripts/run-gatsby.js wrapper hardcodes gatsby.cmd as the Gatsby binary path on Windows. When dependencies are installed with pnpm or bun, only gatsby.exe / gatsby.bunx are created in node_modules/.bin/, causing the dev server to fail with:
'gatsby_modules.bin\gatsby.cmd' is not recognized as an internal or external command
Fix: Fall back through gatsby.cmd → gatsby.exe → gatsby.bunx on Windows.

Expected Behavior

• for users using bun/pnpm the server should start normally for that not only search for gatsby.cmd but gatsby.exe and gatsby.bunx as fallback on windows

Screenshots

Environment:

• Host OS: Windows
• Browser: Chrome

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