Add .gitattributes to enforce LF line endings and binary file handling

- Created .gitattributes file to normalize line endings for text files to LF on commit.
- Specified LF line endings for Go source files, shell scripts, and marked certain file types as binary.

Author: TMHSDigital

.gitattributes

@@ -0,0 +1,16 @@
+# Normalize all text files to LF on commit.
+* text=auto eol=lf
+
+# Ensure Go source is always LF (gofmt requirement).
+*.go text eol=lf
+*.mod text eol=lf
+*.sum text eol=lf
+
+# Keep shell scripts LF.
+*.sh text eol=lf
+
+# Mark binaries as binary.
+*.exe binary
+*.png binary
+*.jpg binary
+*.gif binary