fix(redis): enable item deletion and inline editing in list key editor

[ZhuchkaTriplesix]

Summary

In RedisKeyEditor, collection types provide deletion controls:

• Hashes support HDEL via _hashDel
• Sets support SREM via _setRemove
• Sorted Sets support ZREM via _zsetRemove

However, for lists (_buildListEditor), only RPUSH is implemented. The _IndexedValueRow widget only displays the index and value without any deletion or editing options. If a user pushes an incorrect item or wants to delete or update an element at a given index, there is no way to do so via the UI.

Repro

1. Open a Redis list key in RedisKeyEditor.
2. Push a new item using RPUSH.
3. Try to delete or edit an existing item in the list.
4. Notice that no delete button or action exists in _IndexedValueRow.

Scope

• Implement item deletion in _IndexedValueRow using LREM or pop commands.
• Provide inline editing or an edit dialog for list items using LSET key index value.
• Respect widget.isReadOnly and prompt with confirmDestructiveAction before deletion.

Out of scope

• Arbitrary index element insertion (LINSERT).

[ZhuchkaTriplesix]

Resolved by #928 (already merged into dev; not auto-closed since this repo's default branch is main and PRs merge into dev).