Finalized Snapcraft support

snap/gui/raspirus.desktop

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+[Desktop Entry]
+Name=Raspirus
+GenericName=Raspirus
+Comment=A user- and resources-friendly rules-based malware scanner
+Exec=raspirus
+Terminal=false
+Type=Application
+Icon=${SNAP}/meta/gui/raspirus.svg
+Categories=GTK;Utility;
+StartupNotify=false

snap/snapcraft.yaml

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+name: raspirus
+base: core22
+version: 2.0.0
+summary: A resource- and human-friendly malware scanner
+description: Raspirus is your cost-free, versatile malware scanner. Tailored rules-based detection, comprehensive file scans, and privacy prioritized for swift, reliable protection.
+grade: stable
+confinement: strict
+architectures:
+  - build-on: [amd64]
+  - build-on: [arm64]
+  - build-on: [riscv64]
+
+
+parts:
+  raspirus:
+    plugin: rust
+    source: .
+    stage-packages:
+      - libssl-dev
+
+apps:
+  raspirus:
+    command: bin/raspirus
+    plugs:
+      - home
+      - removable-media
+      - network
+    extensions:
+      - gnome