tab manager multi select mode

[brindy]

Task/Issue URL: https://app.asana.com/0/392891325557410/1209303765372372/f
Tech Design URL:
CC:

Description:
Adds UI and menus for multi-tab select.

Minor deviation from Figma - long press menu items are only specific to the current tap and make more sense.

Steps to test this PR:

Phone:

1. Internal user off
2. Go to tab switcher ensure it looks like production
3. Internal user on
4. Open various combinations of new tabs / web pages, single, and multiple.
5. Check that long pressing a tab and choosing select tab enters select mode and selects the tab
6. Tap anywhere on screen to exit select mode
7. Tap anywhere on screen again to go back to previous screen
8. Back in tab switcher tap edit and check menu items
9. Use Select Tabs to enter select mode
10. Check bottom menu and button are enabled when appropriate and show correct menu items
11. Check long press menu items are appropriate

Repeat test on iPad:

1. Bottom bar (and therefore menu) doesn't exist, check Figma for iPad details

Definition of Done (Internal Only):

• Does this PR satisfy our Definition of Done?

[github-actions]

	Warnings
⚠️	PR has more than 500 lines of code changing. Consider splitting into smaller PRs if possible.

Generated by 🚫 dangerJS against 120fbf9

[dus7]

Good job! Works as advertised. I checked both iPhone and iPad. Leaving one suggestion and one place to fix which is causing retain cycles.

[dus7]

Looks good! Checked described scenarios and verified there are no retain cycles.