Preserve DOCX content with multiline XML opening tags

[RowletCC]

Valid WordprocessingML permits a tab, carriage return or newline between an element name and its attributes. The DOCX importer currently recognizes only a space or > after paragraph, run, list-property and table names. A multiline paragraph can disappear, a tab-separated run loses its text, and multiline list/table tags lose their interpretation.

This change accepts the four XML whitespace characters at those existing boundaries. It keeps the parser's current structure and adds a deterministic DOCX fixture alongside its readable word/document.xml.

Validation: four regression cases fail on upstream; the unchanged-spacing control passes. With the fix, the TypeScript build and all seven related DOCX tests pass:

node node_modules/typescript/bin/tsc -p tsconfig.json
node --test test/import-document-whitespace.test.ts test/import-document.test.ts test/docx-emphasis.test.ts

Please review this ordinary document-import fix under the advertised valid bug-fix PR reward. Any accepted reward should use native SOL on Solana mainnet at the existing address 5wzc9saR1iiPSCLoGS7DU6bbEiCUysUUcPhLx2E7KcRU; please confirm the net amount before payment.