chore: add github templates

Signed-off-by: Chojan Shang <chojan.shang@vesoft.com>

Author: Chojan Shang

.github/ISSUE_TEMPLATE/bug-report.yml

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+name: Bug Report
+description: Tell us about a regression or defect in the ACP Python SDK.
+title: "bug: "
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: >
+        Thanks for filing a detailed bug. Fill out every section so we can
+        reproduce the issue quickly and keep the SDK solid.
+
+  - type: textarea
+    id: summary
+    attributes:
+      label: Summary
+      description: What went wrong? Keep it short but specific.
+      placeholder: "Streaming updates stop after the second prompt…"
+    validations:
+      required: true
+
+  - type: textarea
+    id: repro
+    attributes:
+      label: Reproduction steps
+      description: >
+        Commands, code, or payloads that trigger the bug. Include any relevant
+        input files or snippets (redact secrets).
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected result
+      placeholder: "Tool call should finish and emit a completed status…"
+    validations:
+      required: true
+
+  - type: textarea
+    id: actual
+    attributes:
+      label: Actual result
+      placeholder: "Agent hangs and no further session/update payloads arrive…"
+    validations:
+      required: true
+
+  - type: input
+    id: versions
+    attributes:
+      label: Versions / environment
+      description: >
+        Include SDK version, ACP schema tag (if pinned), Python version, and OS.
+      placeholder: "sdk 0.5.1 (schema v0.4.7), Python 3.12.2 on macOS 14.4"
+    validations:
+      required: true
+
+  - type: textarea
+    id: logs
+    attributes:
+      label: Logs & screenshots
+      description: Paste relevant stack traces, JSON snippets, or console output.
+      render: shell
+
+  - type: checkboxes
+    id: willing-to-pr
+    attributes:
+      label: Open to submitting a fix?
+      options:
+        - label: I’m willing to open a PR for this bug.

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Ask a question
+    url: https://github.com/agentclientprotocol/python-sdk/discussions/new?category=q-a
+    about: Usage questions, architecture ideas, and doc clarifications live best in Discussions.
+  - name: Read the docs
+    url: https://agentclientprotocol.github.io/python-sdk/
+    about: The published docs cover quickstart steps, contrib helpers, and release workflows.

.github/ISSUE_TEMPLATE/feature-request.yml

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+name: Feature Request
+description: Pitch an improvement for the ACP Python SDK docs, runtime, or tooling.
+title: "feat: "
+labels: ["enhancement"]
+body:
+  - type: markdown
+    attributes:
+      value: >
+        Feature requests work best when they focus on the problem first. Tell us
+        what you’re trying to achieve and why existing APIs aren’t enough.
+
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem statement
+      description: >
+        What use case is blocked? Include relevant transports, helpers, or user
+        journeys.
+      placeholder: "Need a helper to batch tool call updates when streaming…"
+    validations:
+      required: true
+
+  - type: textarea
+    id: proposal
+    attributes:
+      label: Proposed solution
+      description: >
+        Sketch the API or behaviour you’d like to see. Code snippets welcome.
+    validations:
+      required: true
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives considered
+      description: >
+        Mention workarounds you’ve tried or other approaches we should weigh.
+
+  - type: textarea
+    id: extra
+    attributes:
+      label: Additional context
+      description: Links, screenshots, related issues, etc.
+
+  - type: checkboxes
+    id: willing-to-help
+    attributes:
+      label: Can you help build it?
+      options:
+        - label: I can contribute code or docs for this request.

.github/pull_request_template.md

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+## Summary
+
+<!-- What does this change do? Keep it short. -->
+
+
+## Related issues
+
+<!--
+Link the tracked issue(s) using the GitHub syntax, e.g. "Closes #123".
+If the work only partially addresses an issue, use "Relates to #123".
+-->
+
+
+## Testing
+
+<!--
+List the checks you ran (e.g. `make check`, `make test`, targeted pytest files, manual CLI steps).
+Include output snippets when helpful.
+-->
+
+
+## Docs & screenshots
+
+<!--
+Note any documentation or example updates included (or explain why none are needed).
+Attach screenshots/GIFs when the change affects UX.
+-->
+
+
+## Checklist
+
+- [ ] Conventional Commit title (e.g. `feat:`, `fix:`).
+- [ ] Tests cover the change or are not required (explain above).
+- [ ] Docs/examples updated when behaviour is user-facing.
+- [ ] Schema regenerations (`make gen-all`) are called out if applicable.