Add code formatting configuration with clang-format

.clang-format

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+---
+Language:        Cpp
+BasedOnStyle:  LLVM
+AlignArrayOfStructures: Left
+ColumnLimit:     160

scripts/reformat-all.sh

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+#!/bin/bash
+
+# Go to repository root
+cd "$(dirname "$0")/.." || exit 2
+
+find ./src ./test -iname '*.h' -o -iname '*.cpp' | xargs clang-format -i