Move readme to root

readme.md

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+# Dqn
+Personal utility library.
+
+## DqnInspect
+A simple C++ introspection metaprogram designed as a prebuild step and generates type information for the inspected types. It is a minimal single header file licensed in the public domain with only CRT dependencies. It is only able to parse C-like C++, i.e. Plain Old Data types only.
+
+The generated file is written to stdout.
+
+### Usage
+Annotate the C++ code using `DQN_INSPECT`, i.e.
+
+```
+DQN_INSPECT struct Entity
+{
+    V2 pos;
+    V2 size;
+}
+
+DQN_INSPECT enum struct SomeEnum
+{
+    Hello,
+    Foo
+}
+```
+
+And then build DqnInspect by defining `DQN_INSPECT_EXECUTABLE_IMPLEMENTATION` before compiling and execute it as follows
+
+`DqnInspect.exe SourceCode.h > SourceCodeInspected.h`
+
+Include and use the file in code
+
+```
+#include "DqnReflect.h"
+#include "SourceCode.h"
+#include "SourceCodeInspected.h"
+SomeEnum enum = SomeEnum::Hello;
+printf("%s\n", DqnInspect_EnumString(enum)); // prints Hello
+
+Entity entity = {};
+DqnInspect_Struct const *inspector = DqnInspect_GetStruct(&entity);
+for (int i = 0; i < inspector->members_len; ++i)
+    printf("%s\n", inspector->members[i].name);
+```