Rename app to Oikos (was oikos-desktop)

- Binary: oikos-desktop → Oikos
- Bundle: oikos-desktop.app → Oikos.app
- Install path: /Applications/Oikos.app
- Auto-update paths updated
- CI Linux binary renamed

cmd/desktop/Info.plist.template

@@ -5,7 +5,7 @@
 	<key>CFBundleDevelopmentRegion</key>
 	<string>en</string>
 	<key>CFBundleExecutable</key>
-	<string>oikos-desktop</string>
+	<string>Oikos</string>
 	<key>CFBundleIdentifier</key>
 	<string>com.hubris.oikos-desktop</string>
 	<key>CFBundleIconFile</key>