add pvipr spec content & data

Signed-off-by: Toshaan Bharvani <toshaan@vantosh.com>

content/specifications/power-vector-intrinsic-programming-reference.md

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+---
+title: "Power Vector Intrinsics Programming Reference Specification"
+tags:
+  - pvipr
+date: 2021-03-24
+draft: false
+---
+
+The purpose of this document is to provide a guide for vector programming on OpenPOWER systems,
+with an emphasis on examples of best practices.
+It further provides a reference for intrinsics provided by compliant compilers on OpenPOWER systems.  
+
+This document is a Standard Track, Work Group Specification work product owned by the System Software Workgroup
+and handled in compliance with the requirements outlined in the OpenPOWER Foundation Work Group (WG) Process document.
+It was created using the Master Template Guide version 1.0.0. Comments, questions, etc. can be submitted to the public forun for this document. 

data/specifications/power-vector-intrinsic-programming-reference.yaml

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+versions:
+  - number: 1.0.0
+    date: 2020-08-11
+    description: Initial document