Add minimal example

examples/minimal/.gitignore

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+# Build files
+/build
+/build.ninja
+/shuriken.override.yaml

examples/minimal/shuriken.yaml

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+# Example shuriken.yaml config for a minimal C++ project with modules.
+
+defaults:
+  cpp_standard: c++20
+  cpp_flags: -Wall -Wextra -Werror -pedantic
+
+default_target: linux
+
+targets:
+  linux:
+    output_file: minimal_example

examples/minimal/src/generators/number.cppm

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+export module generators.number;
+
+// Example function that returns a number
+export int get_number() {
+    return 42;
+}

examples/minimal/src/generators/text.cppm

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+export module generators.text;
+
+// Example function that returns a string
+export const char* get_text() {
+    return "meow!";
+}

examples/minimal/src/main.cpp

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+import printing;
+
+// Example main function that calls a function from a module to print things
+int main() {
+    print_things();
+}

examples/minimal/src/printing.cppm

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+module;
+
+#include <iostream>
+
+import generators.number;
+import generators.text;
+
+export module printing;
+
+// Example function that prints things from the generator functions
+export void print_things() {
+    std::cout << get_text() << '\n';
+    std::cout << get_number() << '\n';
+}

examples/minimal/tools/shuriken.py

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+../../../src/shuriken.py