Add ONNX models for web demo (based on https://github.com/Parskatt/RoMaV2)

.gitkeep

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+# ONNX Model Files
+
+This directory should contain the exported FP16 ONNX models.
+
+To generate them, run from the RoMaV2 root directory:
+
+    uv run python web_demo/scripts/export_web_models.py
+
+Expected files:
+- dinov3_turbo_fp16.onnx
+- matcher_turbo_fp16.onnx
+- dinov3_fast_fp16.onnx
+- matcher_fast_fp16.onnx
+- dinov3_base_fp16.onnx
+- matcher_base_fp16.onnx

dinov3_base.onnx

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+version https://git-lfs.github.com/spec/v1
+oid sha256:bf4decbb903f7dfe4b74b655e04274ccba2f3555c068e1b16d5f67c094e74c07
+size 919833377

dinov3_fast.onnx

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c281345a71ec75762aaecb4e91e25a1fb01226f19f660e5f4caf219394ab0a07
+size 919833313

dinov3_turbo.onnx

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f047c552b291b4f82ca4ea24cb86eef8effb8b095fc3bf33e961bec72e7b7ac2
+size 919833209

matcher_base.onnx

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2653a11b950f8595a31eb1714a607ae41bc3f5911098f8d1f2f314b8e5bccd4b
+size 488970544

matcher_fast.onnx

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:bb6ed67a05ddadaf61e45b00d8b073ea5a78c0a7e19a250c1fc81cc41d2500ac
+size 485835184

matcher_turbo.onnx

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:56c60691ed2b377558efbac00efdd0cc7a47a83221ec6bcc701286a401f5cef5
+size 482437716