Add issue templates and funding

.github/FUNDING.yml

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+ko_fi: canton7
+custom: ['https://www.paypal.com/donate?hosted_button_id=92FADFBYS42MU']

.github/ISSUE_TEMPLATE/bug_template.md

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+---
+name: Report a bug
+about: If you've definitely found something wrong, use this. Not sure? Open a discussion.
+---
+
+**Description**
+A clear and concise description of what the bug is. Use screenshots as necessary.
+
+**To Reproduce**
+Code to reproduce the bug, which someone else can run.
+
+**Version Info**
+ - Stylet version: [e.g. 1.2.3]
+ - Runtime version: [e.g. 5.0.300]
+
+**Additional Info**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Open a Discussion
+    url: https://github.com/canton7/stylet/discussions/new
+    about: If you've got a question, suggestion, or something you're not sure about, please open a discussion.