Upgrade issue templates

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: 🐛 Report a bug
+description: Help improve GAS-ICS-Sync by reporting observed bugs. Got a question or need support? See "Have questions or need support?" instead!
+body:
+  - type: markdown
+    attributes:
+      value: >
+
+        ### ✋ **[READ FIRST] This is bug tracker, not a support forum**
+
+
+        If something isn't working right, you have questions or need help, [**create a discussion instead**](https://github.com/derekantrican/GAS-ICS-Sync/discussions).
+
+
+        Only proceed here if you are 100% sure the issue you are seeing is actually a bug. If in doubt, check
+        the discussions first, we can always file a bug from a support request later.
+
+
+        ---
+
+
+        **Thank you for wanting to report a bug!**
+  - type: textarea
+    attributes:
+      label: The problem
+      description: >-
+        Describe the issue you are experiencing here. Tell us what you were trying to do
+        step by step, and what happened that you did not expect.
+
+        Provide a clear and concise description of what the problem is and include as many
+        details as possible.
+      placeholder: |
+        1. ...
+        2. ...
+        3. ...
+    validations:
+      required: true
+  - type: markdown
+    attributes:
+      value: |
+        ## Environment
+  - type: input
+    attributes:
+      label: Version of GAS-ICS-Sync
+      description: Can be found near the bottom of the Helpers.gs file (look for `var thisVersion = 5.7;`)
+    validations:
+      required: true
+  - type: markdown
+    attributes:
+      value: |
+        ## Other helpful information
+  - type: markdown
+    attributes:
+      value: >-
+        If you have any of the following, please include it:
+
+          * Screenshots
+          * An input ics string that can reproduce the problem (you can remove sensitive information with https://derekantrican.com/icssanitizer)
+          * Your settings (approx lines 34-50 of Code.gs. eg `var howFrequent = ....` and the following lines) 
+  - type: textarea
+    attributes:
+      label: Additional information & file uploads

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: 🤔 Have questions or need support?
+    url: https://github.com/derekantrican/GAS-ICS-Sync/discussions
+    about: Create a discussion

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: ✨ Request a feature
+description: Request a new feature to implement in GAS-ICS-Sync
+title: "[Request]"
+body:
+  - type: markdown
+    attributes:
+      value: >
+        **Thank you for wanting to request a feature in GAS-ICS-Sync!**
+
+
+        Before you go ahead with your request, please note that any feature that is only
+        of interest to a small sub group will not be implemented. Only such features
+        that are of interest to a majority of users will be implemented as part of the script.
+
+        If you have a very specific request for your use case and would like help implementing
+        it, feel free to create a [discussion](https://github.com/derekantrican/GAS-ICS-Sync/discussions) instead and we can help you there.
+
+  - type: textarea
+    attributes:
+      label: Is your feature request related to a problem? Please describe.
+      description: Please describe the feature you would like to see (it would be helpful if you could add any necessary screenshots, [ics strings](https://github.com/derekantrican/GAS-ICS-Sync/wiki/Debugging-tips#using-an-explicit-ics-string-instead-of-an-url), etc)
+  - type: textarea
+    attributes:
+      label: Describe the solution you'd like
+      description: A clear and concise description of what you want to happen. Explain why it should be included in GAS-ICS-Sync.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Additional context
+      description: Add any other context or screenshots about the feature request here.