Add bug, feature and change request issue templates since present template isn't working

[sfstar]

This PR introduces new templates for bug, changes and feature request issues.
It replaces the current issue template format since github can't seem to parse it.

Proposed change

Adds issue templates for different issue types to allow for quicker troubleshooting of users issues.
Since this enforces the first couple of troubleshooting steps to be performed before submitting an issue and thereby saving time.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: None
• This PR is related to issue: None
• Link to documentation pull request: None

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• The code has been formatted using Ruff (ruff format custom_components/victron)

[sfstar]

@julesxxl and/or @remcom could either of you look at this PR when you have time to do so?

[julesxxl]

@sfstar: good! The instructions are clear and will better define requests.