chore: add GitHub issue templates (#551)

Signed-off-by: Joel Wong <[email protected]>

.github/ISSUE_TEMPLATE/bug.yml

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+name: "\U0001F41B Bug Report"
+description: Report a bug
+title: "Bug: (short bug description)"
+labels: ["bug", "needs triage"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for taking the time to fill out this bug report!
+
+        ⚠️ If the bug that you are reporting is a security-related issue or security vulnerability,
+        then please do not create a report via this template. Instead please
+        notify AWS/Amazon Security via our [vulnerability reporting page](http://aws.amazon.com/security/vulnerability-reporting/)
+        or directly via email to [AWS Security]([email protected]).
+
+  - type: textarea
+    id: description
+    attributes:
+      label: Describe the bug
+      description: What is the problem? A clear and concise description of the bug.
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected_behaviour
+    attributes:
+      label: Expected Behaviour
+      description: What did you expect to happen?
+    validations:
+      required: true
+
+  - type: textarea
+    id: current_behaviour
+    attributes:
+      label: Current Behaviour
+      description: What actually happened? Please include as much detail as you can.
+    validations:
+      required: true
+
+  - type: textarea
+    id: reproduction_steps
+    attributes:
+      label: Reproduction Steps
+      description: |
+        Please provide as much detail as you can to help us understand how we can reproduce the bug.
+        Step by step instructions and self-contained code snippets are ideal.
+    validations:
+      required: true
+
+  - type: textarea
+    id: environment
+    attributes:
+      label: Environment
+      description: Please provide information on the environment and software versions that you are using to reproduce the bug.
+      value: |
+        At minimum:
+        1. Operating system (e.g. Windows Server 2022; Amazon Linux 2023; etc.)
+        2. Version of this package
+
+        Please share other details about your environment that you think might be relevant to reproducing the bug.
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false

.github/ISSUE_TEMPLATE/doc.yml

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+name: "📕 Documentation Issue"
+description: Issue in the documentation
+title: "Docs: (short description of the issue)"
+labels: ["documentation", "needs triage"]
+body:
+  - type: textarea
+    id: documentation_issue
+    attributes:
+      label: Documentation Issue
+      description: Describe the issue
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: "\U0001F680 Feature Request"
+description: Request a new feature
+title: "Feature request: (short description of the feature)"
+labels: ["enhancement", "needs triage"]
+body:
+  - type: textarea
+    id: problem
+    attributes:
+      label: Describe the problem
+      description: |
+        Help us understand the problem that you are trying to solve, and why it is important to you.
+        Provide as much detail as you are able.
+    validations:
+      required: true
+
+  - type: textarea
+    id: proposed_solution
+    attributes:
+      label: Proposed Solution
+      description: |
+        Describe your proposed feature that you see solving this problem for you. If you have a
+        full or partial prototype implementation then please open a draft pull request and link to
+        it here as well.
+    validations:
+      required: true
+
+  - type: textarea
+    id: use_case
+    attributes:
+      label: Example Use Cases
+      description: |
+        Provide some sample code snippets or shell scripts that show how **you** would use this feature as
+        you have proposed it.
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/maintenance.yml

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+name: "🛠️ Maintenance"
+description: Some type of improvement
+title: "Maintenance: (short description of the issue)"
+labels: ["maintenance", "needs triage"]
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: Describe the improvement and why it is important to do.
+    validations:
+      required: true
+  - type: textarea
+    id: solution
+    attributes:
+      label: Solution
+      description: Provide any ideas you have for how the suggestion can be implemented.
+    validations:
+      required: true