Add bug and feature issue form (#1118)

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug report
+description: Report a bug or issue. See closed issues before reporting to confirm issue has not been reported or resolved.
+title: "[Bug]: "
+labels: ["bug"]
+assignees: []
+body:
+  - type: markdown
+    attributes:
+      value: "#### Thank you for reporting this issue. Please provide all the required information to help us understand and resolve the issue."
+
+  - type: input
+    id: bug-description
+    attributes:
+      label: "Description"
+      description: "Provide a summary of the issue."
+      placeholder: "Example: Adyen Checkout API returns an unexpected error when..."
+    validations:
+      required: true
+
+  - type: textarea
+    id: reproduce-steps
+    attributes:
+      label: "Steps to reproduce"
+      description: "List necessary steps to help us reproduce the issue."
+      placeholder: |
+        1. Install the Adyen API'...'
+        2. Create '...'
+        3. Import and use the NotificationRequest object '...'
+        3. Run '...'
+        4. Observer error '...'
+    validations:
+      required: true
+
+  - type: textarea
+    id: actual-behavior
+    attributes:
+      label: "Actual behavior"
+      description: "Describe what happened - the error or unexpected behaviour you see."
+      placeholder: "Example: The API returns a 500 internal server error."
+
+  - type: textarea
+    id: expected-behavior
+    attributes:
+      label: "Expected behavior"
+      description: "Describe what you expected to happen."
+      placeholder: "Example: The Adyen Checkout API should return a 200 status with the correct response payload."
+    validations:
+      required: true
+
+  - type: textarea
+    id: code-snippet
+    attributes:
+      label: "Code snippet or screenshots (if applicable)"
+      description: "Provide relevant code snippets or screenshots to illustrate the issue."
+      placeholder: "```csharp\n// Your code here\n```"
+
+  - type: input
+    id: adyen-api-version
+    attributes:
+      label: "Adyen .NET API Library version"
+      description: "Specify the version of the Adyen API library you're using."
+      placeholder: "Example: 20.1.2"
+    validations:
+      required: true
+
+  - type: input
+    id: dotnet-version
+    attributes:
+      label: ".NET version"
+      description: "Specify the .NET version you're using."
+      placeholder: "Example: 20"
+    validations:
+      required: true
+
+  - type: dropdown
+    id: operating-system
+    attributes:
+      label: "Operating System"
+      description: "Select your operating system."
+      options:
+        - Windows
+        - macOS
+        - Linux
+        - Other
+    validations:
+      required: true
+
+  - type: textarea
+    id: additional-context
+    attributes:
+      label: "Additional context"
+      description: "Provide any other relevant details."
+      placeholder: "Example: This issue started after updating to version X."

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: Feature request
+description: Request a new feature or improvement. See open issues before requesting.
+title: "[Feature]: "
+labels: ["Feature"]
+assignees: []
+body:
+  - type: markdown
+    attributes:
+      value: "#### Is your feature request related to a problem? Please describe."
+
+  - type: input
+    id: feature-summary
+    attributes:
+      label: "Feature summary"
+      description: "Provide a short description of the feature request."
+      placeholder: "Example: Add support for donation event."
+
+  - type: textarea
+    id: problem-statement
+    attributes:
+      label: "Problem statement"
+      description: "Explain the problem this feature aims to solve."
+      placeholder: "Example: I have an issue with consuming the donations webhook."
+    validations:
+      required: true
+
+  - type: textarea
+    id: proposed-solution
+    attributes:
+      label: "Proposed solution"
+      description: "Describe how you want this feature to work."
+      placeholder: "Example: Add Donation enum to ..."
+    validations:
+      required: true
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: "Alternatives considered"
+      description: "Describe any alternative solutions you've explored."
+      placeholder: "Example: I tried to extend the current namespace but ..."
+
+  - type: textarea
+    id: additional-context
+    attributes:
+      label: "Additional context"
+      description: "Provide any extra details, references, or screenshots."