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.

src/PiPedalVersion.cpp

@@ -54,7 +54,7 @@ static std::string MakeWebAddress(const std::string &address, uint16_t port)
 
 PiPedalVersion::PiPedalVersion(PiPedalModel&model)
 {
-    server_ = "PiPedal Server";
+    server_ = "OP-Pedal / Ourpad Pedal Server";
     // defined on build command line.
     serverVersion_ = PROJECT_DISPLAY_VERSION;
 #ifdef _WIN32