## Summary
Migrates the eight concrete New Guild System gumps (CreateGuild, GuildInfo,
GuildMemberInfo, GuildRoster, GuildDiplomacy, WarDeclaration,
GuildAdvancedSearch, GuildInvitationRequest) and three abstract bases
(BaseGuildGump, BaseGuildListGump, OtherGuildInfo) from the legacy `Gump`
class to `DynamicGump`. Layout work moves from constructor-side `AddX(...)`
calls into `BuildLayout(ref DynamicGumpBuilder builder)` — the abstract
`BaseGuildGump` now provides a `BuildContent` callout for shared
tab-strip chrome, and `BaseGuildListGump<T>` adds another
`BuildListExtras` hook so subclasses can paint highlighted titles after
the filter/sort/pagination chrome.
The headline win is the **self-refresh pattern** on the list gumps and
diplomacy advanced search. Previously each filter/sort/back/forward
click allocated a brand new gump via `GetResentGump`. After migration,
those handlers mutate `_filter`, `_startNumber`, `_comparer`, `_ascending`,
or `_display` on the existing gump and call `from.SendGump(this)`,
letting the singleton path in `NetStateGumps.Send` swap in the same
instance with the new layout. The original list is preserved separately
from the per-render filtered/sorted `_displayList`, so refreshes pick up
the latest state without losing the source list.
All guild gumps deal with per-instance dynamic strings (guild names,
member names, war declarations, alliance names), which would defeat
`StaticGump<T>` caching per the cliloc rule, so every concrete subclass
migrates to `DynamicGump`. `AllianceRosterGump` (in `Misc/Guild.cs`)
is a `GuildDiplomacyGump` subclass and inherits the new behavior; its
unused override and stored alliance reference were dropped along with
the now-obsolete `GetResentGump` abstract.
## Summary
Migrates the Old Guild System (pre-AOS guild stones) gumps from the legacy `Gump` class to `DynamicGump`, following the same pattern used for the Quest gump migration in #2416. All concrete gumps now have private constructors gated by static `DisplayTo` entry points (empty-gump rule), and `Singleton => true` is set across the board so reopening a sibling dialog automatically closes the previous one.
**Migrated gumps:**
- `GuildGump` - main guild dialog
- `GuildmasterGump` - guildmaster functions
- `GuildCharterGump` - charter and website display
- `GuildWarGump` - warfare status (kept as player-facing)
- `GuildWarAdminGump` - war menu (retained as player-facing - reachable from `GuildmasterGump`'s WAR button by guildmasters)
- `GuildChangeTypeGump` - Standard/Order/Chaos selection
**Abstract bases:** `GuildListGump` and `GuildMobileListGump` keep their shared list-rendering chrome inside a single concrete `BuildLayout` on the abstract class and expose a `protected abstract void BuildHeader(ref DynamicGumpBuilder builder)` hook for subclasses (replacing the old `Design()` override). This mirrors the abstract-base treatment used for the ML quest base in the quest-gump migration PR.
**Concrete subclasses migrated alongside the abstract bases:**
- `GuildListGump` subclasses: `GuildAcceptWarGump`, `GuildDeclarePeaceGump`, `GuildDeclareWarGump`, `GuildRejectWarGump`, `GuildRescindDeclarationGump`
- `GuildMobileListGump` subclasses: `DeclareFealtyGump`, `GrantGuildTitleGump`, `GuildAdminCandidatesGump`, `GuildCandidatesGump`, `GuildDismissGump`, `GuildRosterGump`
**Cliloc rule:** Every gump bakes per-instance dynamic content (guild names, member names, war declarations, candidate lists), which would defeat `StaticGump<T>` caching. Per the cliloc rule, all are `DynamicGump`.
**External callers updated:** the prompt files (`GuildAbbrvPrompt`, `GuildCharterPrompt`, `GuildDeclareWarPrompt`, `GuildNamePrompt`, `GuildTitlePrompt`, `GuildWebsitePrompt`), `RecruitTarget`, the `Guildstone` item, and the New Guild System `GuildInfoGump`'s Order/Chaos handler all now go through static `DisplayTo` entry points instead of `new XGump(...)`.
> [!Important]
> **Developer Note**
> This code change will **completely move gumps out of the core**
### Summary
- Adds `GetGumps()` convenience which exposes methods to Find/Close/Send multiple gumps. This helper is a performance improvement by eliminating the Dictionary<Player, List> lookup for gumps.
