Update issue templates

.github/ISSUE_TEMPLATE/✨-feature-request.md

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+---
+name: "✨ Feature Request"
+about: Suggest a new feature idea.
+title: "[feature]"
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/🐛-bug-report.md

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+---
+name: "\U0001F41B Bug report"
+about: Report an unexpected problem or unintended behavior.
+title: "[BUG] "
+labels: ''
+assignees: ''
+
+---
+
+<!--
+Thanks for your interest in DB-GPT-Web! ❤️
+Please check if there is no similar issue before creating this one.
+-->
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Desktop (please complete the following information):**
+ - OS: [e.g. iOS]
+ - Browser [e.g. chrome, safari]
+ - Version [e.g. 22]
+
+**Smartphone (please complete the following information):**
+ - Device: [e.g. iPhone6]
+ - OS: [e.g. iOS8.1]
+ - Browser [e.g. stock browser, safari]
+ - Version [e.g. 22]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/📜-documentation.md

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+---
+name: "\U0001F4DC Documentation"
+about: Correct spelling errors, improvements or additions to documentation files (README,
+  CONTRIBUTING...).
+title: "[Doc]"
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/🔧-improvement.md

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+---
+name: "\U0001F527 Improvement"
+about: Suggest an idea which is not a feature.
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+<!--
+Thanks for your interest in DB-GPT-Web! ❤️
+Please check if there is no similar issue before creating this one.
+-->
+
+### Expected Behavior
+
+### Actual Behavior
+
+### Proposal

.github/ISSUE_TEMPLATE/🙋-question.md

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+---
+name: "\U0001F64B Question"
+about: Ask a question about DB-GPT-Web.
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+<!--
+Thanks for your interest in Db-GPT-Web! ❤️
+Please check if there is no similar issue before creating this one.
+
+Please ask one question per issue.
+-->
+
+### Question