feat(settings): accent-colored input cursor in add-source form

Match the input's focusedTextColor with cursorColor=theme.accent on
both the name and URL fields.

src/pages/Settings/SourceManager.tsx

@@ -105,6 +105,7 @@ function AddSourceForm() {
 					width={25}
 					textColor={theme.text}
 					focusedTextColor={theme.accent}
+					cursorColor={theme.accent}
 				/>
 			</box>
 			<box flexDirection="row" gap={1}>
@@ -120,6 +121,7 @@ function AddSourceForm() {
 					width={35}
 					textColor={theme.text}
 					focusedTextColor={theme.accent}
+					cursorColor={theme.accent}
 				/>
 			</box>
 			<box