refactor: Significantly refactor how conditions work internally (#1886)

- Much improved API cleanliness and testability to allow further
extensibility in future
 - Simplified code in `live` view

This technically contains a small change in how overrides work in the
`live` view. Since that change is _closer_ to the documentation, and
since this is likely to be rarely used, this is not considered a
breaking change. Previously, overrides for a given live camera would
always render _as if_ that camera was selected, vs was actually
selected. Now, overrides will only apply in the live view when the
camera is _actually_ selected. If this is an issue for you in practice,
lets discuss.

src/config/types.ts

@@ -685,7 +685,7 @@ export type StatusBarItem = z.infer<typeof statusBarItemSchema>;
 
 const viewConditionSchema = z.object({
   condition: z.literal('view'),
-  views: z.string().array(),
+  views: z.string().array().optional(),
 });
 const fullscreenConditionSchema = z.object({
   condition: z.literal('fullscreen'),
@@ -697,7 +697,7 @@ const expandConditionSchema = z.object({
 });
 const cameraConditionSchema = z.object({
   condition: z.literal('camera'),
-  cameras: z.string().array(),
+  cameras: z.string().array().optional(),
 });
 const mediaLoadedConditionSchema = z.object({
   condition: z.literal('media_loaded'),
@@ -773,7 +773,7 @@ export type AdvancedCameraCardCondition = z.infer<
   typeof advancedCameraCardConditionSchema
 >;
 
-export const advancedCameraCardConditionalSchema = z.object({
+const advancedCameraCardConditionalSchema = z.object({
   type: z.literal('custom:advanced-camera-card-conditional'),
   conditions: advancedCameraCardConditionSchema.array(),
   elements: z.lazy(() => pictureElementsSchema),
@@ -1328,16 +1328,6 @@ const liveConfigSchema = z
   .default(liveConfigDefault);
 export type LiveConfig = z.infer<typeof liveConfigSchema>;
 
-// This schema is used when the live config needs to be overridden (see
-// `live.ts`). Overrides will always be "relative" to the config root, so this
-// schema maintains that 'depth' from the root but without the other
-// requirements that advancedCameraCardConfigSchema has. Without this, overrides
-// calculated in `live.ts` would fail since cameras/type are not provided (as
-// these are mandatory parameters in the full config).
-export const liveConfigAbsoluteRootSchema = z.object({
-  live: liveConfigSchema,
-});
-
 // *************************************************************************
 //                       Cast Configuration
 // *************************************************************************