Go engine third-party notices

Tackbox is MIT licensed; see ../tackbox.LICENSE.txt.
inventory.json lists the Go runtime, linked modules, and vendored source
components, with versions, source URLs, and license paths. The ERC011 source
is adapted from gopls unusedparams; its files and adaptations are recorded
in the same inventory.
Full upstream license texts are in the sibling *.LICENSE.txt files.
