chore: add GitHub issue and pull request templates [skip ci]

.github/ISSUE_TEMPLATE/01_bug_report.yml

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+name: 🐞 Bug report
+description: Create a report to help us improve
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for reporting an issue to improve DIAL.
+        Please fill in as much of the following form as you're able.
+  - type: input
+    attributes:
+      label: Name and Version
+      description: Application name and version
+      placeholder: dial 1.2.3
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: What steps will reproduce the bug?
+      description: Enter details about your bug.
+      placeholder: |
+        1. In this environment...
+        2. With this config...
+        3. Run '...'
+        4. See error...
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: What is the expected behavior?
+      description: If possible please provide textual output instead of screenshots.
+  - type: textarea
+    attributes:
+      label: What do you see instead?
+      description: If possible please provide textual output instead of screenshots.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Additional information
+      description: Tell us anything else you think we should know.

.github/ISSUE_TEMPLATE/02_feature_request.yml

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+name: "🚀 Feature request"
+description: Suggest an idea for this project
+labels: ["enhancement"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for suggesting an idea to improve DIAL.
+        Please fill in as much of the following form as you're able.
+  - type: input
+    attributes:
+      label: Name and Version
+      description: Application name and version
+      placeholder: dial 1.2.3
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: What is the problem this feature will solve?
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: What is the feature you are proposing to solve the problem?
+      description: Describe the requests. If you already have something in mind... PRs are welcome!
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: What alternatives have you considered?

.github/ISSUE_TEMPLATE/config.yml

@@ -1 +1,5 @@
 blank_issues_enabled: false
+contact_links:
+  - name: 📝 Talk in Discord
+    url: https://discord.com/channels/831132799535939614/1172686875299950683
+    about: Discuss your question in Discord

.github/pull_request_template.md

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+### Applicable issues
+
+<!-- Please link the GitHub issues related to this PR (You can reference an issue using # then number, e.g. #123) -->
+- fixes #
+
+### Description of changes
+
+<!-- Please explain the changes you made right below this line. -->
+
+### Checklist
+
+<!-- [Place an '[X]' (no spaces) in all applicable fields. Please remove unrelated fields.] -->
+
+- [ ] Title of the pull request follows [Conventional Commits specification](https://www.conventionalcommits.org/en/v1.0.0/)
+
+By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.