Relative run mode (#1512)

* inti relative mode

* send imediat update on mode change

* add relative to test

* don't persist offset mode

* add test relative and update calc function

* pass data from ssocket

* add dev guard

* spelling and comments

* show relative in offset overview

* remove comments

* refactor: move totalDelay to _rundown

* update  clear naming and comments

* remove old testing values

apps/server/src/stores/__mocks__/runtimeState.mocks.ts

@@ -1,4 +1,4 @@
-import { TimerPhase, Playback } from 'ontime-types';
+import { TimerPhase, Playback, OffsetMode } from 'ontime-types';
 import { deepmerge } from 'ontime-utils';
 import type { RuntimeState } from '../runtimeState.js';
 
@@ -16,10 +16,12 @@ const baseState: RuntimeState = {
     selectedEventIndex: null,
     numEvents: 0,
     offset: 0,
+    relativeOffset: 0,
     plannedStart: 0,
     plannedEnd: 0,
     actualStart: null,
     expectedEnd: null,
+    offsetMode: OffsetMode.Absolute,
   },
   timer: {
     addedTime: 0,
@@ -35,10 +37,12 @@ const baseState: RuntimeState = {
   },
   _timer: {
     forceFinish: null,
-    totalDelay: 0,
     pausedAt: null,
     secondaryTarget: null,
   },
+  _rundown: {
+    totalDelay: 0,
+  },
 };
 
 export function makeRuntimeStateData(patch?: Partial<RuntimeState>): RuntimeState {