fix: Rebrand project from PiPedal to OP-Pedal

Updated branding across the project:
- CMakeLists.txt: project name, description, homepage, display version
- src/PiPedalVersion.cpp: server name string
- debian/control: package name, source, homepage, description
- vite/package.json: package name
- vite/index.html: title, meta description
- vite/public/manifest.json: name, short_name, description, URLs
- UI files: AboutDialog, AppThemed, MainPage, SettingsDialog,
  UpdateDialog, WifiConfigDialog, WifiConfigSettings,
  WifiDirectConfigSettings, Tone3000Downloader, Tone3000HelpDialog,
  WindowScale

Preserved upstream copyright/attribution and legal references.

vite/src/pipedal/AboutDialog.tsx

@@ -170,7 +170,7 @@ const AboutDialog = class extends Component<AboutDialogProps, AboutDialogState>
                         }}>
                             <div style={{ display: "flex", flexFlow: "row nowrap" }}>
                                 <Typography noWrap display="block" variant="h6" color="textPrimary" style={{ flexGrow: 1, flexShrink: 1 }}>
-                                    PiPedal <span style={{ fontSize: "0.7em" }}>
+                                    OP-Pedal <span style={{ fontSize: "0.7em" }}>
                                         {serverVersion
                                             + (this.model.serverVersion?.debug ? " (Debug)" : "")}
                                     </span>