Snap addition (#3844)

* add workflow

* branches:
  - snap_addition

* Add snap package build workflow

* Add snap package build master, staging

* snap version from Cargo.toml

* Seems like staging branch should have grade: devel quality level

* Set snap grade based on branch

* add multi arch

* Update snap.yaml

* snap: use arm platform for arm build

* snap: multi platform ci build

---------

Co-authored-by: ardocrat <ardocrat@gri.mw>

.devcontainer/devcontainer.json

@@ -16,5 +16,6 @@
           "github.copilot-chat"
         ]
       }
-    }
+    },
+    "runArgs": ["--privileged", "-v", "/sys/fs/cgroup:/sys/fs/cgroup:ro", "-v", "/tmp:/tmp"]
   }