Remote Audio Access 0.3.1 - Opus runtime notice

Remote Audio Access does not bundle Opus executable files in the .nvda-addon.
On first Opus use it can download the official Windows opus-tools bundle:

https://archive.mozilla.org/pub/opus/win32/opus-tools-0.2-opus-1.3.1.zip
SHA-256: ef23dc3ffa79fb0cea2ac3559c61317ea663e5372dec3b775e47b87b27d47329

The URL is the official Xiph/Mozilla archive. The downloaded archive is accepted
only when its SHA-256 matches the pinned value above. On old Windows 7 systems a
TLS-verification fallback may be used, but hash verification remains mandatory.

Opus and opus-tools are third-party software under permissive BSD-style licenses.
Any license/readme/runtime files present in the verified archive are extracted
alongside the executables.
