Fix missing Browserbase SDK dependencies in generated templates

[shrey150]

Summary

• add explicit TypeScript manifests for download-financial-statements and job-application
• include @browserbasehq/sdk@^2.18.0 alongside their existing Stagehand, dotenv, and Zod dependencies
• make both templates self-contained when cloned by create-browser-app or Browse instead of inheriting the basic scaffold's incomplete dependency set

Why

Both entrypoints import @browserbasehq/sdk, but neither template had its own package.json. Clean generated projects therefore installed the basic scaffold dependencies and failed immediately with ERR_MODULE_NOT_FOUND.

E2E Test Matrix

Command / flow	Observed output	Confidence / sufficiency
Clean pnpm install in each template	Both installed @browserbasehq/sdk@2.18.0 and resolved SDK + Stagehand imports	Proves generated dependency resolution is fixed
pnpm start — download financial statements	PASS; downloaded all four FY2025 statements and produced a 14,332,637-byte ZIP	Proves the clean generated project completes the real Browserbase downloads workflow
pnpm start — job application	PASS; discovered nine synthetic jobs and completed all nine fixture submissions	Proves the clean generated project completes the real Browserbase/Stagehand workflow

The job fixture run emitted existing non-fatal Stagehand socket-close warnings during cleanup; all nine task outcomes succeeded and the process exited zero.

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Note

Low Risk
Dependency-only template manifests; no runtime, auth, or data-handling logic changes.

Overview
Adds dedicated package.json files for the download-financial-statements and job-application templates so generated projects install @browserbasehq/sdk (plus Stagehand, dotenv, and Zod) instead of falling back to the basic scaffold.

That fixes ERR_MODULE_NOT_FOUND when those templates are cloned via create-browser-app or Browse, since both entrypoints already import the SDK.

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