github: Create issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: "[BUG]"
+labels: bug
+assignees: ''
+
+---
+
+**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.
+
+**Logs**
+If applicable, add logs to explain the problem.
+LLDAP should be started in verbose mode (`LLDAP_VERBOSE=true` env variable, or `verbose = true` in the config). Include the logs in triple-backtick "```"
+If integrating with another service, please add its configuration (paste it or screenshot it) as well as any useful logs or screenshots (showing the error, for instance).
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: "[FEATURE REQUEST]"
+labels: enhancement
+assignees: ''
+
+---
+
+**Motivation**
+Why do you want the feature? What problem do you have, what use cases would it enable?
+
+**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. You can include workarounds that are currently possible.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/integration-request.md

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+---
+name: Integration request
+about: Request for integration with a service
+title: "[INTEGRATION]"
+labels: integration
+assignees: ''
+
+---
+
+**Checklist**
+- [ ] Check if there is already an [example config](https://github.com/lldap/lldap/tree/main/example_configs) for it.
+- [ ] Try to figure out the configuration values for the new service yourself.
+  - You can use other example configs for inspiration.
+  - If you're having trouble, you can ask on [Discord](https://discord.gg/h5PEdRMNyP) or create an issue.
+  - If you succeed, make sure to contribute an example configuration, or a configuration guide.
+- If you hit a block because of an unimplemented feature, create an issue.
+
+**Description of the service**
+Quick summary of what the service is and how it's using LDAP. Link to the service's documentation on configuring LDAP.
+
+**What you've tried**
+A sample configuration that you've tried.
+
+**What's not working**
+Error logs, error screenshots, features that are not working, missing features.