feat: upgrade to donglora-client 0.2, simplify connection, fix org URLs

- Upgrade donglora-client from 0.1 to 0.2 (ping-on-connect validation)
- Remove manual mux/serial fallback and manual ping — handled by client now
- Fix repository/homepage URLs to github.com/donglora/bridge
- Fix README links to donglora GitHub org

Cargo.lock

@@ -906,7 +906,7 @@ dependencies = [
 
 [[package]]
 name = "donglora-bridge"
-version = "0.2.2"
+version = "0.3.0"
 dependencies = [
  "anyhow",
  "blake3",
@@ -938,9 +938,9 @@ dependencies = [
 
 [[package]]
 name = "donglora-client"
-version = "0.1.0"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "162468289ac189a798c4ecd961ed92c5dde2d9c5709d779ae324e0bb9a5ac4dc"
+checksum = "1936935d31ab56a8cd70ceecfd6d447f2628a73a123e1cfe37ee4987eab0fa70"
 dependencies = [
  "anyhow",
  "serialport",