Add an opt-in --file-issue flag to hyperframes feedback. When set, after
sending the usual feedback the CLI publishes a minimal repro of the project
to a public URL (consent-gated, mirroring publish --yes) and opens a
pre-filled GitHub bug issue draft containing the rating, comment, public
repro link, and environment summary. The user reviews and submits the issue
under their own account; there is no token, backend, or gh invocation. New
--dir selects the project to publish; --yes skips the consent prompt for
scripts. URL/body building is extracted into pure, unit-tested helpers.
