docs(github): add issue templates for bug reports and feature requests

Provide structured forms for users to submit bug reports.
Offer a clear template for users to propose new features.
Configure issue templates to disable blank issues and link to discussions.
Improve the quality and consistency of incoming issues.

Author: 0xtbug

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,53 @@
+name: Bug Report
+description: Create a report to help us improve ZeroLimit
+title: "[Bug]: "
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report!
+  - type: textarea
+    id: environment
+    attributes:
+      label: Environment
+      description: Provide details about your system and setup.
+      value: |
+        - OS:
+        - ZeroLimit version:
+        - CLIProxyAPI version:
+        - Client(s) (e.g., Claude Code CLI, Cursor):
+        - Network (e.g., Home network, Corporate VPN):
+    validations:
+      required: true
+  - type: textarea
+    id: reproduce
+    attributes:
+      label: Steps to reproduce
+      description: What did you do?
+      placeholder: |
+        1. Install and start CLIProxyAPI.
+        2. ...
+    validations:
+      required: true
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected behavior
+      description: What did you expect to happen?
+    validations:
+      required: true
+  - type: textarea
+    id: actual
+    attributes:
+      label: Actual behavior
+      description: What actually happened?
+    validations:
+      required: true
+  - type: textarea
+    id: details
+    attributes:
+      label: Additional details
+      description: Add any other context about the problem here. Screenshots or console logs are helpful.
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: GitHub Discussions
+    url: https://github.com/0xtbug/zero-limit/discussions
+    about: Ask questions, share ideas, and engage with the community. 

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,38 @@
+name: Feature Request
+description: Suggest an idea for ZeroLimit
+title: "[Feature]: "
+labels: ["enhancement"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to propose a new feature for ZeroLimit!
+  - type: textarea
+    id: problem
+    attributes:
+      label: Is your feature request related to a problem? Please describe.
+      description: A clear and concise description of what the problem is.
+      placeholder: I'm always frustrated when...
+    validations:
+      required: true
+  - type: textarea
+    id: solution
+    attributes:
+      label: Describe the solution you'd like
+      description: A clear and concise description of what you want to happen.
+    validations:
+      required: true
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Describe alternatives you've considered
+      description: A clear and concise description of any alternative solutions or features you've considered.
+    validations:
+      required: false
+  - type: textarea
+    id: extra
+    attributes:
+      label: Additional Context
+      description: Add any other context or screenshots about the feature request here.
+    validations:
+      required: false