chore: add prettier (1/3): add packages, configurations, fix lint issues (#6382)

* fix: remove redundant eslint rules

* chore: bump `prettier` to v2.8.7

* docs: vue files to use html comments for licenses

- Prettier's Vue parser freaks out if it sees a *.js style comment in a *.vue file.

* docs: more licenses for vue files

* fix: don't ignore *.vue files

* fix: use defaults for tabWidth and printWidth

* simplify .prettierignore

* enforce a printWidth of 100

* fix: use `eslint-plugin-prettier`, remove conflicting rules

* test: fix gauge tests (for real)

* test: fix notebook test selectors

* test: fix restrictedNotebook test selectors

* test: remove useless assignment

* lint: __dirname as global

* lint: revert eslint config + whitespace changes, commit new config

* style: remove unnecessary string concat of literals

* test: fix missed gauge test

* fix: use new eslint rules

* feat: add blank `.git-blame-ignore-revs` file

* docs: update to mention Prettier and format.

* Revert "test: fix gauge tests (for real)"

This reverts commit 6afad450389edc2f16ff0d00c9524621a7ba53bc.

* Revert "test: fix notebook test selectors"

This reverts commit 17fe1cbbff02e9298f041b5ea0fea5494fe54d94.

* Revert "test: fix restrictedNotebook test selectors"

This reverts commit 97e0ede826b7dd61c5443845443d806a56f3f305.

* Revert "test: fix missed gauge test"

This reverts commit e2398fc38ca94beff2066cc253173412ad47f8b9.

* test: fix gauge tests (no formatting)

* test: update notebook e2e selectors (no formatting)

* test: update restrictedNotebook e2e selectors (no formatting)

* fix: temporarily disable lint check

e2e/tests/functional/plugins/operatorStatus/operatorStatus.e2e.spec.js

@@ -19,7 +19,7 @@
  * this source code distribution or the Licensing information page available
  * at runtime from the About dialog for additional information.
  *****************************************************************************/
-
+/* global __dirname */
 /*
 * This test suite is dedicated to testing the operator status plugin.
 */
@@ -40,9 +40,7 @@ STUB (test.fixme) Rolling through each
 test.describe('Operator Status', () => {
     test.beforeEach(async ({ page }) => {
         // FIXME: determine if plugins will be added to index.html or need to be injected
-        // eslint-disable-next-line no-undef
         await page.addInitScript({ path: path.join(__dirname, '../../../../helper/', 'addInitExampleUser.js')});
-        // eslint-disable-next-line no-undef
         await page.addInitScript({ path: path.join(__dirname, '../../../../helper/', 'addInitOperatorStatus.js')});
         await page.goto('./', { waitUntil: 'domcontentloaded' });
     });