Find a better way to handle linking

[Jdaviz-Triage-Bot]

Reporter: Jesse Averbukh

Data needs to be linked in order to enable features like contouring and blinking (in imviz). There have been a few PRs to address linking in jdaviz:

• Remove redundant linking code #1169
• Fix data linking to allow contour over-plotting #1154
• Remove dependency on spectral-cube #1006
• Etc.

But there needs to be a more unified and sturdy approach to it. It seems that at this point each config and each plugin has it's own linking code, which will only result in headaches down the line.

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DISCLAIMER: This issue was autocreated by the Jdaviz Issue Creation Bot on behalf of the reporter. If any information is incorrect, please contact Duy Nguyen