feat: add expressive offline Russian book TTS

tools/tts/run_booktts_prosody_finetune_windows.ps1

@@ -0,0 +1,17 @@
+param([string]$Root = 'C:\Users\seven\AletheiaBookTTS')
+
+$ErrorActionPreference = 'Stop'
+$env:PYTHONUTF8 = '1'
+$env:PYTHONIOENCODING = 'utf-8'
+$python = Join-Path $Root '.venv\Scripts\python.exe'
+$work = Join-Path $Root 'work'
+& $python (Join-Path $work 'booktts_student.py') train `
+    --dataset (Join-Path $work 'student-dataset-prosody-v1') `
+    --initial-model (Join-Path $work 'student-100k-v1\student.pt') `
+    --output (Join-Path $work 'student-100k-prosody-v1') `
+    --epochs 8 `
+    --batch-size 32 `
+    --learning-rate 0.00005 `
+    --validation-fraction 0.1 `
+    --early-stopping-patience 3
+exit $LASTEXITCODE