Add prebuild directory and update git dot files

.gitattributes

@@ -0,0 +1,10 @@
+# Default: normalize all text files to LF
+* text=auto eol=lf
+
+# Windows-only scripts: keep CRLF on Windows checkouts
+*.ps1 text eol=crlf
+*.bat text eol=crlf
+*.cmd text eol=crlf
+
+# Explicitly force LF for shell scripts regardless of platform
+*.sh text eol=lf