Dance around early support (#897)

## Link to GitHub Issue or related Pull Request, if one exists
N/A

## Description of change
This PR add initial supports for running Dance aRound in window mode,
with keyboard, cardio supports.

## Testing
- Tested game play under Windows 10 using Kinect V1 with my visionpose
compatible layer (https://github.com/Avimitin/dance-around-anygear)


https://github.com/user-attachments/assets/4b821dcf-751d-4953-b626-4a9491569183

- Tested full game play, user profile saving with Asphyxia

Assisted by AI.

---------

Co-authored-by: Codex <codex@openai.com>

src/spice2x/easrv/easrv.cpp

@@ -573,6 +573,13 @@ static inline void easrv_init_messages() {
             "\x5b\x99\xa1\x15\x78\x16\x84\xe0\x67\x2c\x75\xf7\xc0\x38\xd5\x20\xf7\x81\xae\x1f\x77\x02\xdf\x0c"
             "\x60\x68\x2e\x26\xe5\xbb\xb7\xb4\x41\x72\xc4\xa4\x43\x2a\xc8\x81\xd3\x8a\x1f\xe8\x94\x39\x7e\xf6"
             "\x69\x56\x9e\xaf\x06\x10\xfd\x47\x69\xb8\x14\xe6\x48\x36\xd6\x25\x18\x0c\x2b\x3d\x69");
+    if (avs::game::is_model("UDN")) {
+        // Only UDN needs an ASCII location/name for the Unity score-screen marshaler.
+        // These 12 encoded bytes replace the name with "SPICE2 LOCAL";
+        // its terminator, the other fields and the response length stay unchanged.
+        EA_FACILITY_GET.replace(311, 12,
+                "\xf2\x20\xcc\x9a\xe3\x32\x78\x80\x9a\xba\xcd\xc3");
+    }
     EA_PCBEVENT_PUT = std::string(
             "\x17\x7e\x7c\x0e\x1a\x15\x41\x0b\xae\xd5\xa0\xf5\x2c\xa1\xb9\xd2\x53\xca\xd2\x0d\x81\x34\xdb\x94\x79\xd0"
             "\xc8\x9d\xb5\xfb\xef\x97");