move win/gatuna-client to gatuna-win, rename project to gatuna

- Directory: win/gatuna-client/ -> gatuna-win/
- Project file: gatuna-client.csproj -> gatuna.csproj
- Assembly name: gatuna-client -> gatuna
- Root namespace: gatuna_client -> gatuna
- All .cs files: namespace gatuna_client -> gatuna
- app.manifest: assemblyIdentity name -> gatuna
- README: updated all paths and references

README.md

@@ -19,8 +19,8 @@ pass unimpeded. See `wireguard-windows/tunnel/firewall/blocker.go:156`.
 - **`gatunad`** — Rust server (`gatunad/`). Runs on the peer (Linux) that owns
   the real services. Announces upstreams and relays TCP between the tunnel and
   `127.0.0.1:<port>`.
-- **`gatuna-client`** — .NET 8 WinForms client (`win/gatuna-client/`). Runs on
-  the killswitched Windows box. Discovers the server, presents its upstreams as
+- **`gatuna`** — .NET 8 WinForms client (`gatuna-win/`). Runs on the
+  killswitched Windows box. Discovers the server, presents its upstreams as
   local loopback listeners, and hauls bytes over the same L2 protocol. Includes
   a network test (PING/PONG) for measuring latency, jitter, and loss.
 
@@ -65,9 +65,9 @@ sudo ./gatunad eth0 22 8800:site-a 8080:site-b
 Exposes upstreams `1→127.0.0.1:22`, `2→127.0.0.1:8800` (label `site-a`),
 `3→127.0.0.1:8080` (label `site-b`).
 
-## `gatuna-client` usage
+## `gatuna` usage
 
-1. Launch `gatuna-client.exe` (UAC prompt expected — Npcap requires admin).
+1. Launch `gatuna.exe` (UAC prompt expected — Npcap requires admin).
 2. Select the network adapter connected to the same L2 segment as the server.
 3. Click **Discover**. The server's hostname and MAC appear; the upstream list
    populates.
@@ -105,13 +105,13 @@ The binary is at `gatunad/target/release/gatunad`.
 ### Build the client (Windows)
 
 ```powershell
-cd win\gatuna-client
+cd gatuna-win
 dotnet build -c Release
 ```
 
 Or run directly:
 ```powershell
-dotnet run --project win\gatuna-client -c Release
+dotnet run --project gatuna-win -c Release
 ```
 
 ### Npcap
@@ -168,16 +168,15 @@ gatuna/
 │       ├── frame.rs         # wire protocol encode/decode
 │       ├── upstream.rs      # cmdline parsing, hostname, upstream table
 │       └── session.rs       # session store, socket→tunnel pump
-└── win/
-    └── gatuna-client/       # .NET 8 WinForms client
-        ├── gatuna-client.csproj
-        ├── app.manifest     # requireAdministrator
-        ├── Program.cs       # tray icon, entry point
-        ├── MainForm.cs      # UI: adapter picker, discover, test, upstream list
-        ├── TunnelLink.cs    # SharpPcap wrapper, raw Ethernet send/recv
-        ├── Frame.cs         # wire protocol encode/decode (mirrors Rust frame.rs)
-        ├── SessionManager.cs # session lifecycle, listeners, OPEN serialization
-        └── PingTest.cs      # PING/PONG network test with stats
+└── gatuna-win/              # .NET 8 WinForms client
+    ├── gatuna.csproj
+    ├── app.manifest         # requireAdministrator
+    ├── Program.cs           # tray icon, entry point
+    ├── MainForm.cs          # UI: adapter picker, discover, test, upstream list
+    ├── TunnelLink.cs        # SharpPcap wrapper, raw Ethernet send/recv
+    ├── Frame.cs             # wire protocol encode/decode (mirrors Rust frame.rs)
+    ├── SessionManager.cs    # session lifecycle, listeners, OPEN serialization
+    └── PingTest.cs          # PING/PONG network test with stats
 ```
 
 ## License