Update issue templates

Initial issue template. Created following https://help.github.com/en/github/building-a-strong-community/configuring-issue-templates-for-your-repository#configuring-the-template-chooser. 

If change is needed, we could go another round.

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve our code.
+title: "[BUG] "
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A concise description of what the bug is.
+
+**Target**
+- Development board: [e.g. HiFive11 RevB]
+- Instruction Set Architecture: [e.g. RV32IMAC]
+- IDE and version: [e.g. Freedom Studio 4.12.0.2019-08-2]
+- Toolchain and version: [e.g. riscv64-unknown-elf-gcc-8.3.0-2019.08.0]
+
+**Host**
+- Host OS: [e.g. MacOS]
+- Version: [e.g. Mojave 10.14.6]
+
+**To Reproduce**
+- Use project ... and configure with ...
+- Run on ... and could observe ... 
+
+**Expected behavior**
+A concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/documentation-issue.md

@@ -0,0 +1,21 @@
+---
+name: Documentation issue
+about: Create a report to help us improve our documentation.
+title: ''
+labels: documentation
+assignees: ''
+
+---
+
+**Describe the issue**
+Please describe the issue and expected clarification in concise language.
+
+**Reference**
+Please attach the URL at which you are experiencing the issue. 
+
+**Screenshot**
+If applicable, please attach screenshot.
+
+**Browser**
+- Browser: [e.g. Chrome]
+- Version: [e.g. 80.0.3987.132]

.github/ISSUE_TEMPLATE/general-inquiry.md

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+---
+name: General inquiry
+about: Free form communication.
+title: ''
+labels: question
+assignees: ''
+
+---
+
+We do encourage you to take a look at [FreeRTOS official site](https://www.freertos.org) for general information and [FreeRTOS forum](https://forums.freertos.org) to access our community.
+
+If still needed, could create a general inquiry report here.