add bug bounty template

.github/ISSUE_TEMPLATE/bug_bounty.yml

@@ -0,0 +1,73 @@
+name: Bug Report
+description: File a bug report and have a chance to claim our bug bounty
+title: "[Bug]: "
+labels: ["bug", "bug bounty"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report! 
+        By submitting the bug, you will participate in our [bug bounty program](https://github.com/etherisc/depeg-ui/wiki/Bug-Bounty-Program) and have the chance to earn some DIP. 
+        In case your bug gets accepted (in this case we will add the label _accepted_ to the issue) and you are eligible for the bug bounty, we'll notify you how you will receive the bounty. 
+        Please **do not change any of the preselected labels or assignees**.
+  - type: textarea
+    id: what-happened
+    attributes:
+      label: What happened?
+      description: |
+        Also tell us, what did you expect to happen? If possible, please provide screenshots (drag and drop images into the text area) and the date and time the problem occured. 
+        Additionally, if you the bug was encountered while interacting with a wallet (e.g. while buying a policy), please provide the wallet address you used. 
+        And any other data you think will help us to reproduce the bug. The more details we have, the better we can figure out what went wrong.
+      placeholder: Tell us what you see!
+      value: "A bug happened!"
+    validations:
+      required: true
+  - type: dropdown
+    id: operating-system
+    attributes:
+      label: What operating system are you seeing the problem on?
+      multiple: true
+      options:
+        - Windows
+        - Mac OS
+        - Linux
+        - Android
+        - iOS
+        - Other (please mention in the description)
+    validations:
+      required: true
+  - type: dropdown
+    id: browsers
+    attributes:
+      label: What browsers are you seeing the problem on?
+      multiple: true
+      options:
+        - Firefox
+        - Chrome
+        - Safari
+        - Microsoft Edge
+        - Brave
+        - Other (please mention in the description)
+    validations:
+      required: true
+  - type: dropdown
+    id: wallet-extension
+    attributes:
+      label: What wallet extension are you using?
+      multiple: true
+      options:
+        - Metamask
+        - Rabby Wallet
+        - WalletConnect
+        - Other (please mention in the description)
+    validations:
+      required: true
+  - type: checkboxes
+    id: terms
+    attributes:
+      label: Rules
+      description: By submitting this issue, you agree to follow our [Rules](https://github.com/etherisc/depeg-ui/wiki/Bug-Bounty-Program)
+      options:
+        - label: I agree to follow this project's rules
+          required: true
+