New , form-based Issue templates for Github repository (#6919)

I think a proper issue template based on simple form would make creating
a proper issues easier for users.

These templates can be checked on my fork of this repo:
https://github.com/pktiuk/cvat/issues/new/choose

![image](https://github.com/opencv/cvat/assets/45544416/ffe2a64c-1cc6-4834-8ec9-9548144a21f5)

.github/ISSUE_TEMPLATE/bug.yaml

@@ -0,0 +1,65 @@
+name: "\U0001F41E Bug Report"
+description: Create a bug report to help us fix it
+labels: ["bug"]
+body:
+- type: checkboxes
+  attributes:
+    label: Actions before raising this issue
+    options:
+    - label: I searched the existing issues and did not find anything similar.
+      required: true
+    - label: I read/searched [the docs](https://github.com/cvat-ai/cvat/tree/master#documentation)
+      required: true
+
+- type: textarea
+  attributes:
+    label: Steps to Reproduce
+    description: Provide a link to a live example or an unambiguous set of steps to reproduce this bug. Include code to reproduce, if relevant.
+    placeholder: |
+      1. Go to '...'
+      2. Click on '....'
+      3. Scroll down to '....'
+      4. See error
+  validations:
+    required: false
+- type: textarea
+  attributes:
+    label: Expected Behavior
+    description: A concise description of what you expected to happen.
+  validations:
+    required: false
+- type: textarea
+  attributes:
+    label: Possible Solution
+    description: |
+      Not obligatory, but suggest a fix/reason for the bug, or ideas on how to implement the addition or change
+  validations:
+    required: false
+- type: textarea
+  attributes:
+    label: Context
+    description: |
+      How has this issue affected you? What are you trying to accomplish?
+      Providing context helps us come up with a solution that is most useful in the real world!
+
+      Tip: You can attach images or log files by clicking this area to highlight it and then dragging files in.
+  validations:
+    required: false
+- type: textarea
+  attributes:
+    label: Environment
+    description: |
+      Include relevant details about the environment you experienced
+    placeholder: |
+      - Git hash commit (`git log -1`):
+      - Docker version `docker version` (e.g. Docker 17.0.05):
+      - Are you using Docker Swarm or Kubernetes?
+      - Operating System and version (e.g. Linux, Windows, MacOS):
+      - Code example or link to GitHub repo or gist to reproduce problem:
+      - Other diagnostic information / logs:
+        <details>
+        <summary>Logs from `cvat` container</summary>
+        </details>
+    render: Markdown
+  validations:
+    required: false

.github/ISSUE_TEMPLATE/feature_request.yaml

@@ -0,0 +1,41 @@
+name: "\U0001F680 Feature Request"
+description: Suggest an idea for this project
+labels: ["enhancement"]
+body:
+- type: checkboxes
+  attributes:
+    label: Actions before raising this issue
+    options:
+    - label: I searched the existing issues and did not find anything similar.
+      required: true
+    - label: I read/searched [the docs](https://github.com/cvat-ai/cvat/tree/master#documentation)
+      required: true
+- type: textarea
+  attributes:
+    label: Is your feature request related to a problem? Please describe.
+    description: A clear and concise description of what the problem is.
+    placeholder: I'm always frustrated when I have to press this small button.
+  validations:
+    required: false
+- type: textarea
+  attributes:
+    label: Describe the solution you'd like
+    description: A clear and concise description of what you want to happen.
+    placeholder: Make this button bigger
+  validations:
+    required: false
+- type: textarea
+  attributes:
+    label: Describe alternatives you've considered
+    description: A clear and concise description of any alternative solutions or features you've considered.
+    placeholder: I wanted to buy bigger display, but it would be too expensive.
+  validations:
+    required: false
+- type: textarea
+  attributes:
+    label: Additional context
+    description: |
+      Add any other context or screenshots about the feature request here.
+      Tip: You can attach images or log files by clicking this area to highlight it and then dragging files in.
+  validations:
+    required: false

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- New , form-based Issue templates for Github repository
 - TDB
 
 ### Changed