ci: implement workflow for developer created releases

[andrewb1269hg]

Create a workflow for developers to publish snaps.

@rbarkerSL and @andrewb1269hg to discuss how to roll .json version numbers forward automatically.

Other commands to be run:
cd into appropriate directory (example: hedera-metamask-snaps/packages/hedera-wallet-snap/packages/snap)
npm i to install npm dependencies
npm run build to build
npm run test to test
npm pack to create the release package
ls | grep tgz to confirm the package was created successfully (it was, name: hashgraph-hedera-wallet-snap-0.6.2.tgz)
npm publish to publish the package to npm registry

There are two snap packages we should be supporting:
hedera-identify-snap
hedera-metamask-snap

Our workflow should default to releasing both, but allow for dry-run functionality (test without releasing), or the ability to release only 1 package.

Definition of Done:

• A new workflow a developer can run to publish snaps
• A toggle feature to enable or disable specific snap publishing (publish either individually or both)

[andrewb1269hg]

Moving to Blocked state until @rbarkerSL and I have a chance to discuss further on Monday, 2/3