Handle Serverless esbuild inject entries

[jakeleventhal]

Summary

• add Serverless Framework plugin entries for esbuild inject files from custom.esbuild and build.esbuild
• keep the existing optional esbuild dependency detection
• extend the TypeScript Serverless fixture to cover injected files

Validation

• node --test packages/knip/test/plugins/serverless-framework.test.ts
• corepack pnpm --dir packages/knip build
• corepack pnpm --dir packages/knip lint

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/knip@1865

npm i https://pkg.pr.new/@knip/language-server@1865

npm i https://pkg.pr.new/@knip/mcp@1865

commit: 6b6bf7b

[webpro]

Thanks for the pull request! Happy top merge, just one nit.

[webpro]

Nitpick: inject is string[] not string (and does require arrayify)

[jakeleventhal]

Done by changing the Serverless esbuild config type so inject is modeled as string[], while keeping arrayify in the resolver for runtime normalization: 6b6bf7b

@webpro ready for another look.

[jakeleventhal]

Feel free to drop the arrayify if you prefer

[webpro]

Thanks Jake!

[webpro]

🚀 This pull request is included in v6.25.0. See Release 6.25.0 for release notes.

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