The THIRD_PARTY_NOTICES.md manifest lived only at the repo root and was
referenced from docs/SOFTWARE.md via a ../ link that escapes the Sphinx
source tree, so it never rendered in the published docs and was absent
from the navigation.
Add docs/THIRD_PARTY_NOTICES.md to the General toctree and fix the
SOFTWARE.md link. The docs page is generated from the canonical root file
by update_version.sh (like the python-client docs): licenses/*.txt links
point at the repository, and the project-license links point at the
in-docs LICENSE / FPGA_LICENSE pages.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>