Changes how `make pkg-tsh` works so instead of building an installer for the
`tsh` binary, placed under `/usr/local/bin`, we install an app to
`/Applications/tsh-vXXX.app` and link its `tsh` binary to `/usr/local/bin`.
The app shell is necessary to distribute a provisioning profile along with the
signed/entitled/notarized binary. All of that is required for Touch ID to work.
Naked `tsh` binaries are unable to use Touch ID, even if built with the correct
build tags.
I've elected to split the logic from `build-package.sh` into a separate script -
it already does too much as-is. `build-pkg-tsh.sh` is more idiomatic, clears
additional `shellcheck` rules and is easier to dry-run.
#9160
* Build macOS installer for tsh.app
* Add resources to build the tshdev app
Moved from e/
* Add resources to build the tsh app (prod)
* Use production values
* Remove 'tsh' mode from build-package.tsh
* Appease buildbox linter
* Clarify one-time setup
