Add preprocessor and unit_test modules
This change adds two Pigweed modules: pw_preprocessor and pw_unit_test.
The preprocessor module contains header files providing helpful macros
for the C preprocessor. The unit test module contains a starter
implementation of a unit testing framework for Pigweed.
Change-Id: I46e1a4cae1fd8ce36d7840a2e92f8013fb489cde
diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..0398edc
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,7 @@
+BasedOnStyle: Google
+BinPackArguments: false
+BinPackParameters: false
+DerivePointerAlignment: false
+PointerAlignment: Left
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false