fix: copy pdf-parse, xlsx, papaparse, mammoth into packaged app bundle

[deepak0x]

Fixes #486

The four file parser packages (pdf-parse, xlsx, papaparse, mammoth) are loaded inside builtin-tools.ts using a _importDynamic wrapper:

const _importDynamic = new Function('mod', 'return import(mod)') as (mod: string) => Promise<any>;

The comment above it explains the intent — using new Function prevents esbuild from statically resolving the imports, which avoids pulling pdfjs-dist's DOM polyfills into the Electron main process.

The problem is that this creates a conflict with how the app is packaged:

• esbuild cannot see the dynamic import, so the packages are not bundled into main.cjs
• forge.config.cjs explicitly ignores all node_modules when packaging the app

At runtime inside the packaged .app, when _importDynamic('pdf-parse') runs, there is no node_modules anywhere in the directory tree. The error is always:

Cannot find package 'pdf-parse' imported from /Applications/Rowboat.app/Contents/Resources/app/.package/dist/main.cjs

The same failure happens for xlsx, papaparse, and mammoth — all four file formats in parseFile are broken.

Fix

Two file changes:

bundle.mjs — mark the four packages as esbuild externals. The bundled main.cjs will emit require('pdf-parse') calls instead of trying (and failing) to inline them.

forge.config.cjs — after bundling, walk the pnpm store recursively and copy all transitive and optional dependencies of the four packages into .package/node_modules/. Optional dependencies are included because pdfjs-dist loads @napi-rs/canvas (an optional dep) to polyfill DOMMatrix — without it pdf-parse throws at import time.