POC: explore `eslint-plugin-vuejs-accessibility` linter
Two things: - Does it conflict with axe [Accessibility Linter extension for VS code](https://marketplace.visualstudio.com/items?itemName=deque-systems.vscode-axe-linter) - If so, can we explore adding a custom mapping to the extensions or somehow add a custom rule for `autoFocus`? See more notes [on #1 during the July 30 wg-accessibility meeting](https://docs.google.com/document/d/1Ss3vVvLS_sxwkuXT6zm2Unz69KRH2S_FWG_G3xUesRE/edit#heading=h.fjhppf4nnb9n).
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