[Loadouts][Enhancements] Copy and Edit Loadout

[chehitskenniexd]

Background and Issue

• Related Issue: #10222
• Users were accidentally overwriting existing loadouts when attempting to make copies of the loadout. Adding a button to copy and edit would help circumvent this issue as described in the comments of the issue.

Proposed Changes

• Add a button to the LoadoutRow that appears when it is not equipped to allow a user to create a copy of the selected/clicked on LoadoutRow that will then appear in the Loadout popup on the bottom on the browser window like shown below

• This loadout will be unique from the copied loadout and will not overwrite the existing loadout, but will allow the user to save it like a new loadout.

• NOTE I chose to put the button on the row rather than the popup since it'd be more obvious and accessible to users looking on the page.

Code Changes

1. Add a button the the button cluster on the LoadoutRow that reads "Copy and Edit"
2. Add logic to the loadout-drawer/loadout-events.ts file alongside other functionality.
3. Add a line to i18n for the new string that will be shown

Testing

1. pnpm test (may require an update via pnpm test -- -u)
2. manual testing on local DIM instance

Monitoring

1. monitor events fired off from the copyAndEdit function
2. Watch for issues in the DIM Discord pertaining to this issue.
3. Functionality can be reverted with no other side effects if required.