feat(tools)!: SnapOtter 2.0 phase 4 wave 1: 45 core tools across all modalities (#219)

packages/doc-engine/src/index.ts

@@ -1,10 +1,13 @@
 export {
+  gsAvailable,
   qpdfAvailable,
   resolveGs,
   resolveQpdf,
   resolveSoffice,
   sofficeAvailable,
 } from "./binaries.js";
+export { gsCompressPdf, type PdfCompressionPreset } from "./ghostscript.js";
 export { type ConvertOptions, convertDocument } from "./libreoffice.js";
+export { assertValidRange, qpdfMerge, qpdfRotate, qpdfSplitRanges } from "./pdf-ops.js";
 export { pdfPageCountPy } from "./python-docs.js";
 export { qpdfCheck, qpdfPageCount } from "./qpdf.js";