Improving github templates with proper Markdown Syntax

[Nibba2018]

Your checklist for this pull request

Parent issue: #6

The following changes are done:

• Added additional ISSUE_TEMPLATES
• Remove Trailing White spaces
• Translating html code to markdown

Type of change

Select all that applies:

• This change requires a documentation update

Checklist:

• My code follows the style guidelines(Clean Code) of this project
• I have performed a self-review of my own code
• I have used consistent code conventions and clear function/method/variable names
• I have commented on my code, particularly in hard-to-understand areas
• I have created a helpful and easy to understand README.md which contains description, requirements and use case.
• I have added relevent screenshots if necessary
• I have made corresponding changes to the documentation
• My changes generate no new warnings

❤️ Thank you!