Create Issue templates

Author: mackysoft

.github/ISSUE_TEMPLATE/bug-report.yaml

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+name: Bug Report
+description: File a bug report
+title: "[BUG] "
+labels: ["bug"]
+assignees:
+  - mackysoft
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report!
+  - type: textarea
+    id: what-happened
+    attributes:
+      label: What happened?
+      description: Also tell us, what did you expect to happen?
+      placeholder: Tell us what you see!
+      value: "A bug happened!"
+    validations:
+      required: true
+  - type: input
+    id: version
+    attributes:
+      label: Package Version
+      description: What version of this package were you running?
+      placeholder: ex. 1.1.2
+    validations:
+      required: true
+  - type: input
+    id: unity-version
+    attributes:
+      label: Unity Version
+      description: What version of Unity were you running?
+      placeholder: ex. 2020.3.24f1

.github/ISSUE_TEMPLATE/feature-request.yaml

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+name: Feature Request
+description: Suggest an idea for this library
+title: "[FEATURE] "
+labels: ["enhancement"]
+assignees:
+  - mackysoft
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this feature request!
+  - type: textarea
+    id: feature-description
+    attributes:
+      label: Feature destription
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/improvement-request.yaml

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+name: Improvement Request
+description: Suggest an improve for this library
+title: "[IMPROVE] "
+labels: ["enhancement"]
+assignees:
+  - mackysoft
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this improvement request!
+  - type: textarea
+    id: improvement-description
+    attributes:
+      label: Improvement destription
+    validations:
+      required: true