WIP: Add snap definition

[rthill91]

• Add snapcraft.yaml configuration
• Move cache directory to exist under $HOME/.config/pipeline-dash

(#8 should merge first to verify this doesn't conflict)

[hammerstefan]

#8 has been merged

[rthill91]

snap works, I moved the cache to somewhere accessible by the snap (and a place where the snapstore team will allow auto-connect). To verify you can build the snap yourself with

snapcraft # in root directory of project
sudo snap install ./pipeline-dash-*.snap
sudo snap connect pipeline-dash:dot-config-pipeline-dash
pipeline-dash dash <config>

[rthill91]

ah, cli works web doesn't. I'll need to poke and figure out what permission I'm missing (or maybe just a matter of dev config from flask server)