chore: Update issue templates (#2213)

Author: bitsandfoxes

.github/ISSUE_TEMPLATE/blank.yml

@@ -0,0 +1,17 @@
+name: Blank Issue
+description: Blank Issue. Reserved for maintainers.
+labels: ["Unity"]
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: Please describe the issue.
+    validations:
+      required: true
+
+  - type: markdown
+    attributes:
+      value: |-
+        ## Thanks 🙏
+        Check our [triage docs](https://open.sentry.io/triage/) for what to expect next.

.github/ISSUE_TEMPLATE/bug.md

@@ -0,0 +1,55 @@
+name: 🐞 Bug Report
+description: Report a bug in this repo
+labels: ["Unity", "Bug"]
+body:
+  - type: textarea
+    id: environment
+    attributes:
+      label: Environment
+      description: |
+        How do you use Sentry?
+        Sentry SaaS (sentry.io) or self-hosted/on-premise (which version?)
+
+        Which version of the SDK?
+
+        How did you install the package? (Git-URL, Assetstore)
+
+        Which version of Unity?
+
+        Is this happening in Unity (editor) or on a player like Android, iOS, Windows?
+    validations:
+      required: true
+
+  - type: textarea
+    id: steps-to-reproduce
+    attributes:
+      label: Steps to Reproduce
+      description: |
+        1. What
+        2. you
+        3. did.
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected-result
+    attributes:
+      label: Expected Result
+      description: What you thought would happen.
+    validations:
+      required: true
+
+  - type: textarea
+    id: actual-result
+    attributes:
+      label: Actual Result
+      description: What actually happened. Maybe a screenshot/recording? Maybe some logs?
+    validations:
+      required: true
+
+  - type: textarea
+    id: logs-screenshots
+    attributes:
+      label: Any logs or screenshots
+    validations:
+      required: false 

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1 @@
+blank_issues_enabled: false

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,10 @@
+name: 💡 Feature Request
+description: Tell us about a problem our SDK could solve but doesn't.
+labels: ["Unity", "Feature"]
+body:
+  - type: textarea
+    id: feature-request
+    attributes:
+      label: What problem could Sentry solve that it doesn't?
+    validations:
+      required: true