Iroh browser connection experiment

This is an experimental test build, not an anonymity-certified release.
Use disposable test messages. The public relay and website operator can observe
connection metadata; this is not Tor-like anonymity.

Third-party software retains its own licenses and attribution. The hosting
repository's first-party license does not relicense third-party dependencies.
See THIRD-PARTY.json and licenses/ for dependency declarations, license texts,
copyright/author notices, source provenance, and Rust library notices.

For enum-assoc 1.4.1 this distribution supplies the standard Apache-2.0 text
under its declared MIT OR Apache-2.0 choice. For pharos 0.5.3 it supplies the
standard Unlicense text matching the crate declaration and upstream README.
These are identified as standard texts, not recovered upstream notice files.
Rust toolchain notices are a conservative superset, not a claim that every
component mentioned there is linked into this WebAssembly artifact.

No transport dependency source patches are used in this production build.
Instrumented audit builds and their source modifications are not distributed.