Update issue templates

Adding "Support" and "Thanks!" issue templates

Author: retailcoder

.github/ISSUE_TEMPLATE/support.md

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+---
+name: Support
+about: Lost? Not sure how to use a feature? We can help!
+title: ''
+labels: support
+assignees: ''
+
+---
+
+Ask us anything! Describe what you're trying to do, include screenshots, relevant code - anything that helps us help you.

.github/ISSUE_TEMPLATE/thanks-.md

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+---
+name: Thanks!
+about: Tell us how much this add-in changed your life as a VBA/VB6 developer
+title: ''
+labels: thanks
+assignees: ''
+
+---
+
+We don't want your money - what we value the most, what gives us warm fuzzy feelings, is user feedback. Show your appreciation for what we're doing by telling us how Rubberduck features are helping you do your job better. Feel free to give us a star, if you haven't already!