FEATURE: Release GPG signed versions and installers

[starrychloe]

Please sign the .exe and .zip and .dmg and .deb installation packages and post the detached GPG signatures when you release the app. The .asc signatures are nowhere to be found, nor the key used to sign. https://github.com/AkashaProject/dapp/releases/tag/0.6.2

System information

AKASHA version: All of them

Operating System: All of them