Add new issue templates for bugs

Replace the old issue template with two new issue forms to help guide
contributors through the issue creation

Signed-off-by: Ekaterina Gerasimova <kittykat3756@gmail.com>

.github/ISSUE_TEMPLATE/bug-desktop.yml

@@ -0,0 +1,54 @@
+name: Bug report for the Element desktop app (not in a browser)
+description: File a bug report if you are using the desktop Element application.
+title: "[Bug]: "
+labels: [T-Defect, triage]
+assignees:
+  -   
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report!
+
+        Please report security issues by email to security@matrix.org
+  - type: textarea
+    id: reproduction-steps
+    attributes:
+      label: Steps to reproduce
+      description: Please attach screenshots, videos or logs if you can.
+      placeholder: Tell us what you see!
+      value: |
+        1. Where are you starting? What can you see?
+        2. What do you click?
+        3. More steps…
+    validations:
+      required: true
+  - type: textarea
+    id: what-happened
+    attributes:
+      label: What happened?
+      placeholder: Tell us what went wrong
+    validations:
+      required: true
+  - type: textarea
+    id: expected-result
+    attributes:
+      label: What did you expect?
+      placeholder: Tell us what you expected to happen
+    validations:
+      required: true
+  - type: input
+    id: os
+    attributes:
+      label: Operating system
+      placeholder: Windows, macOS, Ubuntu, Arch Linux…
+    validations:
+      required: false
+  - type: input
+    id: version
+    attributes:
+      label: Application version
+      description: You can find the version information in Settings -> Help & About. 
+      placeholder: e.g. Element version 1.7.34, olm version 3.2.3 
+    validations:
+      required: false