Generates inline XBRL (iXBRL) HTML documents for annual statements.

Ported from wenche/xbrl.py in the original Python Wenche project.

iXBRL is the format required by Bronnøysundregistrene. It combines HTML with embedded XBRL tags, making financial figures machine-readable while remaining viewable in web browsers.

Taxonomy: Norwegian GAAP (NRS) simplified for small enterprises.