Fix line endings and some cleanup

.gitattributes

@@ -0,0 +1,39 @@
+# Auto-detect text files and normalize to LF in the repo
+* text=auto
+
+# Explicit text rules
+*.md  text
+*.txt text
+*.json text
+*.yml text
+*.yaml text
+*.toml text
+*.c   text
+*.cpp text
+*.h   text
+*.hpp text
+*.rs  text
+*.py  text
+*.go  text
+*.js  text
+*.ts  text
+*.css text
+*.html text
+*.sh  text eol=lf         # scripts on Unix must be LF
+*.bash text eol=lf
+
+# Windows-native scripts that should remain CRLF in working trees
+*.bat text eol=crlf
+*.cmd text eol=crlf
+*.ps1 text eol=crlf
+
+# Binary (never touch line endings)
+*.png binary
+*.jpg binary
+*.jpeg binary
+*.gif binary
+*.pdf binary
+*.zip binary
+*.exe binary
+*.dll binary
+*.glb binary