feat(hosts): add drag-and-drop and global subscription ordering (#6895)

Hosts already had one saved order on the Hosts page, but subscriptions honoured
it only inside each inbound, so a host of a later inbound could never come before
one of an earlier inbound (#6894). A new opt-in setting makes raw/base64,
Clash/Mihomo and JSON subscriptions follow the Hosts page order across inbounds;
the default keeps today's inbound-first output unchanged. The Hosts table gains
drag-and-drop reordering next to the Up/Down buttons, on a pointer-reorder hook
the Routing Rules table now shares.

frontend/src/generated/examples.ts

@@ -100,6 +100,7 @@ export const EXAMPLES: Record<string, unknown> = {
     "subHappTunMode": "",
     "subHappTunType": "",
     "subHideSettings": false,
+    "subHostSortMode": "inbound-first",
     "subIncyAnnounceUrl": "",
     "subIncyAppAutoDetect": false,
     "subIncyBannerBgColor": "",
@@ -289,6 +290,7 @@ export const EXAMPLES: Record<string, unknown> = {
     "subHappTunMode": "",
     "subHappTunType": "",
     "subHideSettings": false,
+    "subHostSortMode": "inbound-first",
     "subIncyAnnounceUrl": "",
     "subIncyAppAutoDetect": false,
     "subIncyBannerBgColor": "",