Update issue templates

Author: jneira

.github/ISSUE_TEMPLATE/blank-issue.md

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+---
+name: Blank issue
+about: An empty template for other type of issues
+title: ''
+labels: 'status: needs triage'
+assignees: ''
+
+---
+
+

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: 'status: needs triage'
+assignees: ''
+
+---
+
+<!--
+Before opening an issue, please take a look at the [troubleshooting guide](https://github.com/haskell/vscode-haskell#troubleshooting). This explains some common issues and will also help you to find the information that the issue template asks for.
+
+When filing an issue, please fill out as much of the information below as you can. This helps us to debug your issue, but is not required!
+-->
+
+### Your environment
+
+Which OS do you use:
+<!-- Windows, MacOS, Ubuntu, ArchLinux, etc... -->
+
+### Steps to reproduce
+<!-- Tell us how to reproduce this issue, including screenshots if you think they can be useful -->
+
+### Expected behaviour
+<!-- Tell us what should happen. -->
+
+### Actual behaviour
+<!-- Tell us what happens instead. -->
+
+### Include debug information
+Execute in the root of your project the command `haskell-language-server-wrapper --debug .` and paste the logs here (you can find the executable location [here](https://github.com/haskell/vscode-haskell#downloaded-binaries)):
+
+<details>
+<summary>
+Debug output:
+</summary>
+
+```
+<paste your logs here>
+```
+</details>
+
+Paste the contents of extension specific log, you can check instructions about how to find it [here](https://github.com/haskell/vscode-haskell#troubleshooting)
+
+<details>
+<summary>
+Extension log:
+</summary>
+
+```
+<paste your logs here>
+```
+</details>

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+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.