Add markdown to notebook entries (#7084)

* try marked out

* fix url validation

* now rendering blockquotes properly

* add abbrv, link titles, and strikethrough

* fix tests and lint

* Closes #6060
- CSS resets and styling for markdown-related HTML markup in Notebook entries.
- Better styling and cursor affordances for Notebook entry selection and editing interaction flow.

* add line breaks option

* Closes #6060
- Tab

* Closes #6060
- Conversion of contenteditable-div to textarea started.
- Stubbed in textarea with styles.

* have it markdown with a textarea and adjust size automatically

* Closes #6060
- Padding added back to text `div` area.

* Closes #6060
- Styles added to support Shift Log and hover behavior for entries on locked pages.
- Removed `--major` styling from Shift Log Commit Entries button
to reduce confusion with entry commit button.
- CSS code cleanups.

* two step focus/edit. also scroll into view for editing

* add markdown, strip all tags, and truncate

* lint

* remove unneeded code

* fix notebook entry, selected page may also be null

* fix existing notebook tests

* lint

* fix whitelist

* readd whitelist

* lint

* fix link tests

* fix tests

* fix tagging test

* add some markdown test

* get rid of pause

* add another sanitization step

---------

Co-authored-by: Charles Hacskaylo <charlesh88@gmail.com>
Co-authored-by: Jesse Mazzella <ozyx@users.noreply.github.com>

e2e/helper/notebookUtils.js

@@ -34,7 +34,8 @@ async function enterTextEntry(page, text) {
   await page.locator(NOTEBOOK_DROP_AREA).click();
 
   // enter text
-  await page.locator('[aria-label="Notebook Entry"].is-selected div.c-ne__text').fill(text);
+  await page.getByLabel('Notebook Entry Display').last().click();
+  await page.getByLabel('Notebook Entry Input').last().fill(text);
   await commitEntry(page);
 }
 
@@ -52,7 +53,6 @@ async function dragAndDropEmbed(page, notebookObject) {
   await page.click('button[title="Show selected item in tree"]');
   // Drag and drop the SWG into the notebook
   await page.dragAndDrop(`text=${swg.name}`, NOTEBOOK_DROP_AREA);
-  await commitEntry(page);
 }
 
 /**