Document supported printer report process

[dicnunz]

Summary

• move the community-reported working printer list into SUPPORTED_DEVICES.md
• add the new HP Envy 5532 report from Process for adding supported printers #830
• document what details to include when reporting another working printer
• add a dedicated device support report issue template for users who cannot open a PR
• include SUPPORTED_DEVICES.md in the npm package files so the README link works from npm too

Closes #830

Validation

• git diff --check
• node -e "JSON.parse(require('fs').readFileSync('package.json','utf8')); console.log('package.json ok')"

Note: I did not run the full test suite because this only changes documentation/package metadata, not runtime code.

[dicnunz]

One small payment note because the repo has a public PayPal funding link and this closes a bounded docs/process issue: I did this as a tiny paid-support cleanup, not as a claimed bounty. If this saves maintainer time and you want to settle it as a $5 microfix, this checkout works: https://nicdunz.gumroad.com/l/slop-kill-pass?wanted=true

No action needed if you prefer to review it as a normal OSS contribution; the PR itself is ready either way.