chore: pin line endings and editor defaults

.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 = 2
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.{yml,yaml}]
+indent_size = 2
+
+[Makefile]
+indent_style = tab

.gitattributes

@@ -0,0 +1,13 @@
+# Normalize all text files to LF in the repository and in the working tree.
+# Without this, `core.autocrlf=true` on Windows checks files out as CRLF, so the
+# working tree disagrees with what is committed and any tool that compares line
+# endings reports differences that are not really there.
+* text=auto eol=lf
+
+# Binary files git should never touch.
+*.png binary
+*.jpg binary
+*.gif binary
+*.ico binary
+*.vsix binary
+*.tgz binary