chore: init issue templates (#315)

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug report 🐛
+description: Report a bug
+title: "[Bug] <insert descriptive title>"
+labels: ["bug", "triage"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Before submitting, please check if an existing issue already exists. Thanks for taking the time to improve Taiko!
+  - type: textarea
+    id: description
+    attributes:
+      label: Describe the bug
+      description: A concise description of the problem and what you expected to happen.
+      value: Description of the bug here.
+    validations:
+      required: true
+  - type: textarea
+    id: steps-to-reproduce
+    attributes:
+      label: Steps to reproduce
+      description: Steps to reproduce the bug, a numbered list could be good.
+      value: Steps to reproduce here.
+  - type: textarea
+    id: additional-context
+    attributes:
+      label: Additional context
+      description: Provide any additional context, screenshots, etc.
+      value: Additional context here.

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,29 @@
+name: Feature request 💡
+description: Request a feature
+title: "[Feat] <insert descriptive title>"
+labels: ["feat", "triage"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Before submitting, please check if an existing issue already exists. Thanks for taking the time to improve Taiko!
+  - type: textarea
+    id: description
+    attributes:
+      label: Describe the feature request
+      description: A concise description of what the problem and proposed solution is.
+      value: Description of the feature request here.
+    validations:
+      required: true
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Describe alternatives you've considered
+      description: A concise description of any alternative solutions you've considered.
+      value: Description of the alternatives you've considered here.
+  - type: textarea
+    id: additional-context
+    attributes:
+      label: Additional context
+      description: Provide any additional context, screenshots, etc.
+      value: Additional context here.