docs(readme): add common errors markdown file

COMMON_ERRORS.md

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+# Introduction
+
+Below will contain sets of errors that you might get running zspotify. Below will also contain possible fixes to these errors. It is advisable that you read this before posting your error in any support channel.
+
+## AttributeError: module 'google.protobuf.descriptor' has no attribute '\_internal_create_key
+
+_Answer:_
+
+`pip install --upgrade protobuf`
+
+This error happens due to a potentially outdated version of protobuf, to fix it upgrade protobuf by using pip.