chore(lint): add more stylelint rules

[tw15egan]

Test out adding in new stylelint rules for the repo. Right now, spaces are not enforced between blocks, but we can turn that on if we think it is valuable to see the different blocks.

• Will warn for unsupported browser features (https://github.com/ismay/stylelint-no-unsupported-browser-features#stylelint-no-unsupported-browser-features)
• Will enforce rational style order (https://github.com/constverum/stylelint-config-rational-order)

.declaration-order {
  /* Positioning */
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 10;

  /* Box Model */
  display: block;
  float: right;
  width: 100px;
  height: 100px;
  margin: 10px;
  padding: 10px;

  /* Typography */
  color: #888;
  font: normal 16px Helvetica, sans-serif;
  line-height: 1.3;
  text-align: center;

  /* Visual */
  background-color: #eee;
  border: 1px solid #888;
  border-radius: 4px;
  opacity: 1;

  /* Animation */
  transition: all 1s;

  /* Misc */
  user-select: none;
}

Changelog

New

• stylelint-no-unsupported-browser-features
• stylelint-config-rational-order

Changed

• Ran stylelint --fix across the repo to reorder selectors to match the rule

Testing / Reviewing

Ensure styles are still rendering properly

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[andreancardona]

@tw15egan Looks like there are some conflicts - otherwise looks good to me :)

[tw15egan]

Merge conflicts are fixed, but let's wait until #6466 is merged in before we merge this 👍