Use github issue form for submitting issues.

[pissang]

Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

This PR introduces GitHub Issue Form that can help improving developers' experience on bug report or feature request.

We are using an issue-helper page to help developers submitting issue for years. We benefited from it a lot. But still there are some problems:

1. It's a separated experience because developers need to jump to another page to write the issue and then jumping back to submit.
2. When jumping back. The content can be limited on the size.
3. We can't upload a screenshot directly on the issue page. Which I think is a most useful feature in the GitHub comment form.
4. Developers can just ignore this page to create a blank issue. Which lead to an invalid issue. But it may not be really invalid. It's just not follow the step.

Fortunally GitHub brings a new feature called issue form in the early this year. It solves almost all of the problems listed above. Except we need to write version manually instead of choose one from dropdown list. So in this PR I switched to this new issue form. Here is what it looks like:

Bug Report

Feature Request

Others

Merging options

• Please squash the commits into a single one when merge.

Other information

[echarts-bot]

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[echarts-bot]

Congratulations! Your PR has been merged. Thanks for your contribution! 👍