Created issue type for addon integration request (#18980)
### Link to issue number:
n/a internal retro item.
### Summary of the issue:
This is in response to increased requests to integrate addons into core.
The new template explicitly states the key information NV Access
requires to triage the request.
### Description of user facing changes:
None.
### Description of developer facing changes:
New github issue template.
### Description of development approach:
n/a
### Testing strategy:
n/a
### Known issues with pull request:
n/a
### Code Review Checklist:
n/a
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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Sean Budd <sean@nvaccess.org>
