chore: add gitattributes to enforce LF line endings

.gitattributes

@@ -0,0 +1,21 @@
+# Set default behavior to LF
+* text=auto eol=lf
+
+# Explicitly declare files that should always use LF
+*.py text eol=lf
+*.json text eol=lf
+*.md text eol=lf
+*.yaml text eol=lf
+*.yml text eol=lf
+*.sh text eol=lf
+*.ndjson text eol=lf
+*.html text eol=lf
+*.toml text eol=lf
+*.txt text eol=lf
+*.dat text eol=lf
+*.lock text eol=lf
+
+# Denote all files that are truly binary and should not be modified
+*.png binary
+*.jpg binary
+*.gif binary