Add RTD requirements file and test scripts

Signed-off-by: Ayan Sinha Mahapatra <ayansmahapatra@gmail.com>

Author: AyanSinhaMahapatra

docs/requirements-doc.txt

@@ -0,0 +1,3 @@
+doc8==0.8.1
+Sphinx==3.3.1
+sphinx-rtd-theme==0.5.0

docs/scripts/doc8_style_check.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+# halt script on error
+set -e
+# Check for Style Code Violations
+doc8 --max-line-length 100 source --ignore D000 --quiet

docs/scripts/sphinx_build_link_check.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+# halt script on error
+set -e
+# Build locally, and then check links
+sphinx-build -E -W -b linkcheck source build