feat: add .gitattributes for LF normalization and file type handling

.gitattributes

@@ -0,0 +1,38 @@
+# Auto detect text files and perform LF normalization
+* text=auto eol=lf
+
+# Source code
+*.js    text eol=lf
+*.jsx   text eol=lf
+*.ts    text eol=lf
+*.tsx   text eol=lf
+*.json  text eol=lf
+*.css   text eol=lf
+*.html  text eol=lf
+*.astro text eol=lf
+*.md    text eol=lf
+*.yml   text eol=lf
+*.yaml  text eol=lf
+*.sh    text eol=lf
+
+# Documentation
+*.md       text eol=lf
+*.txt      text eol=lf
+LICENSE    text eol=lf
+
+# Configs
+.env*      text eol=lf
+.git*      text eol=lf
+.*rc       text eol=lf
+*.lock     text eol=lf
+*.config.* text eol=lf
+
+# Binary files
+*.ico   binary
+*.jpg   binary
+*.jpeg  binary
+*.png   binary
+*.gif   binary
+*.svg   binary
+*.woff  binary
+*.woff2 binary