chore: add templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+## Describe the bug
+
+A clear and concise description of what the bug is.
+
+## To Reproduce
+
+Steps to reproduce the behavior:
+
+1. Write the code below '...'
+2. Run it with the command '....'
+
+### code snippet
+
+A code snippet that demonstrates the issue or a link to a code repository the developers can easily pull down to recreate the issue locally
+
+**Note**: Because the developers need to copy and paste the code snippet, including a code snippet as a media file (i.e. .gif) is not sufficient.
+
+## Expected behavior
+
+A clear and concise description of what you expected to happen.
+
+## Environment
+
+### SpringQL-client-c
+
+<!--- Point out an asset you use from Releases page: https://github.com/SpringQL/SpringQL-client-c/releases -->
+
+- Version: [e.g. v0.9.0+2]
+- Asset: [e.g. springql_client-x86_64-apple-darwin-debug.zip]
+
+### your machine
+
+- Device: [e.g. MacBook Pro, Raspberry Pi4 ModelB 4GB]
+- OS: [e.g. Ubuntu 22.04]
+
+## Additional context
+
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/ci-related-issues.md

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+---
+name: CI-related issues
+about: Suggest new CI jobs, and report CI troubles
+title: ''
+labels: ci
+assignees: ''
+
+---
+
+

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: feat
+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/refactor-request.md

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+---
+name: Refactor request
+about: Suggest an idea for refactoring
+title: ''
+labels: refactor
+assignees: ''
+
+---
+
+## Motivation
+
+## Refactoring target
+
+<!--- Source files, lines, modules, ... -->

pull_request_template.md

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+## Issue number and link
+
+Fixes: #xxx
+
+<!--- For bugfix, you must link to at least an issue to show clear way to reproduce the bug. -->
+
+<!--- For new feature without any related issues, include your motivation in the next section -->
+
+## Describe your changes
+
+## Checklist before requesting a review
+
+- [ ] I follow the [Semantic Pull Requests](https://github.com/zeke/semantic-pull-requests) rules (bugfix/feature)
+- [ ] I specified links to related issues (must: bugfix, want: feature)
+- [ ] I have performed a self-review of my code (bugfix/feature)
+- [ ] I have added thorough tests (bugfix/feature)
+- [ ] I have edited `## [Unreleased]` section in `CHANGELOG.md` following [keep a changelog](https://keepachangelog.com/en/1.0.0/) syntax (bugfix/feature)
+- [ ] I {made/will make} a related pull request for [documentation repo](https://github.com/SpringQL/SpringQL.github.io) (feature)