(chore) fancy issue templates (#1434)

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,67 @@
+name: "Bug report"
+description: "Create a report to help us improve"
+labels: ["bug"]
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Before you submit a bug, please make sure that:
+        - you have searched and found no existing open issue with the problem at hand
+        - you don't have `"files.associations": {"*.svelte": "html"  }` inside your VSCode settings (if you can't remember ever doing that, you don't have that)
+        - you are using Svelte for VS Code (NOT the old "Svelte" extension by James Birtles) and have disabled all other Svelte-related extensions to reproduce the bug
+        - if it's a preprocessor related bug like "can't use typescript", did you setup `svelte-preprocess` and/or `svelte.config.js`? See the docs for more info.
+
+  - type: textarea
+    id: bug-description
+    attributes:
+      label: Describe the bug
+      description: "Bug description"
+      placeholder: "A clear and concise description of what the bug is."
+    validations:
+      required: true
+
+  - type: textarea
+    id: reproduction
+    attributes:
+      label: Reproduction
+      description: Steps to reproduce
+      placeholder: "For example, a code snippet that is treated in a way you don't expect."
+    validations:
+      required: true
+
+  - type: textarea
+    id: expectation
+    attributes:
+      label: Expected behaviour
+      placeholder: "A clear and concise description of what you expected to happen."
+    validations:
+      required: true
+
+  - type: textarea
+    id: system-info
+    attributes:
+      label: System Info
+      description: "Your operating system, editor, extension version etc."
+      value: |
+        - OS: [e.g. Windows]
+        - IDE: [e.g. VSCode, Atom]
+    validations:
+      required: true
+
+  - type: dropdown
+    id: package
+    attributes:
+      label: Which package is the issue about?
+      options:
+        - Svelte for VS Code
+        - language-server
+        - svelte2tsx
+        - svelte-check
+    validations:
+      required: true
+
+  - type: textarea
+    id: additional-context
+    attributes:
+      label: Additional Information, eg. Screenshots

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: "Feature request"
+description: "Suggest an idea for this project"
+
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: "Is your feature request related to a problem? Please describe."
+      placeholder: "I'm always frustrated when..."
+    validations:
+      required: true
+
+  - type: textarea
+    id: proposed-solution
+    attributes:
+      label: Proposed solution
+      description: "Describe the solution you'd like"
+      placeholder: "A clear and concised description of what you want to happen."
+    validations:
+      required: true
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives
+      description: "Describe alternatives you've considered"
+
+  - type: textarea
+    id: additional-context
+    attributes:
+      label: Additional Information, eg. Screenshots