Add line-ending policy and renormalize to LF

.editorconfig

@@ -0,0 +1,18 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+indent_size = 4
+
+[*.{md,markdown}]
+trim_trailing_whitespace = false
+
+[*.{nix,yml,yaml}]
+indent_size = 2
+
+[Makefile]
+indent_style = tab

.gitattributes

@@ -0,0 +1,17 @@
+# Normalize text files to LF in the repository.
+* text=auto eol=lf
+
+# Windows scripts should stay CRLF when present.
+*.bat text eol=crlf
+*.cmd text eol=crlf
+*.ps1 text eol=crlf
+
+# Binary assets
+*.dll binary
+*.exe binary
+*.gif binary
+*.ico binary
+*.jpeg binary
+*.jpg binary
+*.png binary
+*.zip binary