feat(options): add flag to disable challenge-unassociated items (#608)

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## Scope

Adds an option flag `enableIsolatedItems`, paired with
`enableMasteryProgression` one. When both are set to `true`, the
inventory will function as before. When this flag is `false`, the
inventory will not handle items with no unlocking approaches, like the
official server, which is also the default option. Disabling mastery
progression makes this flag of no use. It can be one of default options
of Peacock imo.

Meanwhile, takes Banker Pack into Peacock's consideration.

## Test Plan

Can "remove" newest items, and when flag's changed to `false` they come
back again.

## Checklist

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- [x] I have run Prettier to reformat any changed files
- [x] I have verified my changes work

Author: RDIL

components/flags.ts

@@ -55,6 +55,12 @@ export const defaultFlags: Flags = {
                 desc: "When set to false, mastery progression will be disabled and all unlockables will be awarded at the beginning",
                 default: true,
             },
+            enableIsolatedUnlockables: {
+                category: "Gameplay",
+                title: "enableIsolatedUnlockables",
+                desc: "Decides if items are unlocked when there are no associated unlocking approaches. Requires enableMasteryProgression to be true.",
+                default: false,
+            },
             elusivesAreShown: {
                 category: "Gameplay",
                 title: "elusivesAreShown",

components/inventory.ts

@@ -74,6 +74,7 @@ const DELUXE_DATA = [
     ...PENICILLIN_UNLOCKABLES,
     ...TOMORROWLAND_UNLOCKABLES,
     ...LAMBIC_UNLOCKABLES,
+    ...FRENCHMARTINI_UNLOCKABLES,
 ]
 
 /**
@@ -197,9 +198,9 @@ function filterUnlockedContent(
 
             if (isEvergreen || isDeluxe) {
                 acc[0].push(unlockable)
-            } else {
+            } else if (getFlag("enableIsolatedUnlockables")) {
                 /**
-                 *  List of untracked items (to award to user until they are tracked to corresponding challenges)
+                 *  List of untracked items when they are enabled (to award to user until they are tracked to corresponding challenges)
                  */
                 acc[1].push(unlockable)
             }