[FEATURE]: highlight "esc" label on hover in dialog

[AksharP5]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Builds off #11421, requested by @rekram1-node to implement the hover, matching theme color.

Before:

opencode-esc-issue-resolved.mov

After:

opencode-esc-dialog-hover.mov