Add offline desktop speech with Silero Xenia for Russian

scripts/silero-requirements.txt

@@ -0,0 +1,10 @@
+filelock==3.32.3
+fsspec==2026.7.0
+jinja2==3.1.6
+markupsafe==3.0.3
+mpmath==1.3.0
+networkx==3.6.1
+setuptools==78.1.0
+sympy==1.14.0
+torch==2.8.0+cpu
+typing-extensions==4.16.0