Add a basic .editorconfig

Signed-off-by: Aaron Raimist <aaron@raim.ist>

.editorconfig

@@ -0,0 +1,9 @@
+# EditorConfig https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+# 4 space indentation
+[*.py]
+indent_style = space
+indent_size = 4

MANIFEST.in

@@ -26,6 +26,7 @@ recursive-include synapse/static *.js
 exclude Dockerfile
 exclude .dockerignore
 exclude test_postgresql.sh
+exclude .editorconfig
 
 include pyproject.toml
 recursive-include changelog.d *

changelog.d/4257.misc

@@ -0,0 +1 @@
+Add a basic .editorconfig