chore: add issue templates (#111)

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,70 @@
+name: 🐛 Bug report
+description: Describe a problem
+labels: bug
+title: '[Bug]'
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Some general tips:
+
+        - Is this really a problem?
+        - Is this a problem here?
+        - Can this be solved in a different way?
+
+  - type: checkboxes
+    id: initial-checklist
+    attributes:
+      label: Initial checklist
+      options:
+        # - label: I agree to follow the [code of conduct](https://github.com/libi/dcron/blob/main/CODE_OF_CONDUCT.md)
+        #   required: true
+        - label: I searched [issues](https://github.com/libi/dcron/issues) and [discussions](https://github.com/libi/dcron/discussions) and couldn’t find anything (or linked relevant results below)
+          required: true
+
+  - type: input
+    id: affected-versions
+    attributes:
+      label: Affected packages and versions
+      description: Please test using the latest version of the relevant packages to make sure your issue has not already been fixed.
+    validations:
+      required: true
+
+  - type: textarea
+    id: steps-to-reproduce
+    attributes:
+      label: Steps to reproduce
+      description: How did this happen? Please provide a [minimal, reproducible example](https://stackoverflow.com/help/minimal-reproducible-example).
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected-behavior
+    attributes:
+      label: Expected behavior
+      description: What should happen?
+    validations:
+      required: true
+
+  - type: textarea
+    id: actual-behavior
+    attributes:
+      label: Actual behavior
+      description: What happens instead?
+    validations:
+      required: true
+
+  - type: dropdown
+    id: operating-system
+    attributes:
+      label: OS
+      description: What operating system are you using?
+      multiple: true
+      options:
+        - Windows
+        - Linux
+        - macOS
+        - Other (please specify in steps to reproduce)
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: true

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: 🚀 Feature request
+description: Suggest an idea
+labels: enhancement
+title: '[Feature]'
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Some general tips:
+
+        - Is this really a problem?
+        - Is this a problem here?
+
+  - type: checkboxes
+    id: initial-checklist
+    attributes:
+      label: Initial checklist
+      options:
+        - label: I agree to follow the [code of conduct](https://github.com/libi/dcron/blob/main/CODE_OF_CONDUCT.md)
+          required: true
+        - label: I searched [issues](https://github.com/libi/dcron/issues) and [discussions](https://github.com/libi/dcron/discussions) and couldn’t find anything (or linked relevant results below)
+          required: true
+
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem
+      description: Please describe the problem you are trying to solve here.
+    validations:
+      required: true
+
+  - type: textarea
+    id: solution
+    attributes:
+      label: Solution
+      description: What should happen? Please describe the desired behavior.
+    validations:
+      required: true
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives
+      description: What are the alternative solutions? Can this be solved in a different way?
+    validations:
+      required: true