Update package manifest files

snap/snapcraft.yaml

@@ -3,7 +3,20 @@ version: "0.2.0.0" # just for humans, typically '1.2+git' or '1.3.2'
 grade: stable # must be 'stable' to release into candidate/stable channels
 summary: A lightweight cross-platform IP scanner # 79 char long summary
 description: |
-  A lightweight cross-platform IP scanner
+  **Usage**
+
+  1. Download the latest release
+  - Chocolatey (Windows): `choco install arp-scanner --version=0.2.0`
+  - Snapcraft (Linux): `snap install arp-scanner`\
+  and `snap connect arp-scanner:network-control` to give it permission to send arp requests
+  - GitHub (Windows/Linux): https://github.com/Stone-Red-Code/ARP-Scanner/releases
+  1. Start `arp-scanner` with the IP range it should scan as parameter (e.g. `192.168.1.0 - 192.168.1.255`)
+
+  > Note: This programm may not work on all linux distributions because the [ArpLookup](https://github.com/georg-jung/ArpLookup) library has some [limitations](https://github.com/georg-jung/ArpLookup#supported-platforms)
+
+  **Third party licenses**
+  - ArpLookup (https://github.com/georg-jung/ArpLookup) - MIT (https://github.com/georg-jung/ArpLookup/blob/master/LICENSE.txt)
+  - IPAddressRange (https://github.com/jsakamoto/ipaddressrange) - MPL-2.0 (https://github.com/jsakamoto/ipaddressrange/blob/master/LICENSE)
 
 base: core22 # the base snap is the execution environment for this snap
 
@@ -30,4 +43,4 @@ apps:
     command: ARP-Scanner
     plugs:
       - network
-      - network-control
+      - network-control