Add GitHub Issue Templates

.github/ISSUE_TEMPLATE/bug-report.md

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+---
+name: "\U0001F41E Bug report"
+about: Create a report to help us improve
+title: "\U0001F41E [Describe Your Bug]"
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug/issue**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. ...
+2. ...
+3. ...
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Your System**
+```
+Windows build number: (run "ver" at a command prompt)
+Flow Launcher version: (Settings => About) 
+```
+**Flow Launcher Error Log**
+<!-- 
+     The latest log file can be found here: %AppData%\FlowLauncher\Logs\<version>\<date>.txt
+     or for portable mode: %LocalAppData%\FlowLauncher\<App-Version>\UserData\Logs\<version>\<date>.txt
+     Drag and drop the log file below this comment.
+-->

.github/ISSUE_TEMPLATE/code-review.md

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+---
+name: "\U0001F50E Code Review"
+about: Describe (bad) code that needs to be improved
+title: "\U0001F50E [Describe Problematic Code]"
+labels: ''
+assignees: ''
+
+---
+
+**Point to the corresponding file and line number(s) which could be improved.**
+
+Click on the line number in GitHub to create an anchored link to the corresponding code section. For example:
+
+
+https://github.com/Flow-Launcher/Flow.Launcher/blob/master/Flow.Launcher/Storage/TopMostRecord.cs#L8
+
+Provide your alternative implementation idea:
+
+```
+Code
+```

.github/ISSUE_TEMPLATE/feature-request.md

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+---
+name: "⭐ Feature request"
+about: Suggest an idea for this project
+title: "⭐ [Describe Your 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.