Create P-Code execution helper in apps/interpreters/prun; The P-Code binary format is functional except that there are still some modularity and kernel build issues that need to be addressed.

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diff --git a/apps/interpreters/prun/README.txt b/apps/interpreters/prun/README.txt
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+README
+^^^^^^
+
+hello.pas
+
+  This is a sample "Hello, World!" Pascal Program
+
+hello.pex
+
+  This is the compiled, linked P-Code executable that results
+  when hello.pas is compiled.
+
+hello.h
+
+  This file defines an initialized C array holds a copy of
+  hello.pex.  This file as created by:
+
+    xxd -i hello.pex >hello.h
+
+mkhello.sh
+
+  This is a scripts that can be used to rebuild both hello.pex
+  and hello.h.
+
+device.c
+
+  The hello.pex file must be provided to the interpreter as a file
+  in the file system.  Normally this would be done using real storage
+  medium.  In this example, we will use device.c:
+
+  device.c implements a simple device driver.  Reads from this device
+  will access the in-memory copy of hello.pex  This device driver is
+  registered as /dev/prun in the pseudo filesystem.
+