chore: 改名同步 TransPyV -> ViperC（.gitignore/文档/脚本）

.gitignore

@@ -28,4 +28,4 @@ __pycache__/
 # 编译
 **/output/
 **/temp/
-**/.tpv_build/
+**/__vpcbuild__/

LICENSE

@@ -619,7 +619,7 @@ Also add information on how to contact you by electronic and paper mail.
   If the program does terminal interaction, make it output a short
 notice like this when it starts in an interactive mode:
 
-    TransPyV  Copyright (C) 2026 TermiNexus
+    ViperC  Copyright (C) 2026 TermiNexus
     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
     This is free software, and you are welcome to redistribute it
     under certain conditions; type `show c' for details.