[FEATURE REQUEST] Scripts should be signed

[twangboy]

Description of Issue/Question

We should probably sign our scripts when we do a release.

On Windows this means we can set the Execution Policy to "RemoteSigned" to add some security while still allowing the bootstrap script to run. I'm assuming we would want to sign the Linux script as well.

For Windows this would need to be an OV Certificate. I'm assuming we could use the same for Linux.

[s0undt3ch]

We GPG sign the releases now, just download <script-name>.<ext>.asc

Could this be used for windows?

[dmurphy18]

@twangboy Currently have the sha256 checksums in the README, is this not enough to guarantee the sanctity of the script provided.