WIP: Replace BaseInput with BaseMetaInput

[fatbattk]

Background

Spawned from, https://github.com/Shopify/pos-next-react-native/pull/51443 which automatically prepends BaseInput data to every worker run call on POS.

Goal here is so there is a clear separation for,

1. event target input types from,
2. the "meta data" input types.

Coupling them makes it difficult to separate type concerns on POS.

Solution

• Move BaseInput properties to BaseMetaInput.
• Left BaseInput as placeholder for all event targets *Inputs.
• The BaseMetaInput types are not needed as arguments for ExtensionRunner.run(), only for UnifiedExtensionWorker.run().
• With this PR, typing on POS is simpler with ExtensionRunner.run() referencing the correct *Inputs type, and optionally UnifiedExtensionWorker.run() can reference the combined typings (currently typed as any).

🎩

1. Check out this branch locally.
2. On POS RN, run ./scripts/ui-extensions/yalc-local-extensions add.
3. Validate on IDE lint. This should not have type errors.

   // example:
   ExtensionRunner.run('pos.cash-tracking-session-start.event.observe', {
     cashTrackingSessionStart: {
       id: getId(cashTrackingSession.id),
       openingTime: cashTrackingSession.openingTime,
     },
   });

Before	After

Checklist

• I have 🎩'd these changes
• I have updated relevant documentation

[github-actions]

We detected some changes in packages/*/package.json or packages/*/src, and there are no updates in the .changeset directory. If the changes are user-facing and should cause a version bump, run yarn changeset to track your changes and include them in the next release CHANGELOG. If you are making simple updates to repo configuration, examples, or documentation, you do not need to add a changeset.

[js-goupil]

I think there's some confusion. The metadata in BaseInput that is being moved over is and should be passed in for all targets. It provides important information on the shop, user, and overall session. In what context would we not need it ?

[fatbattk]

I think there's some confusion. The metadata in BaseInput that is being moved over is and should be passed in for all targets. It provides important information on the shop, user, and overall session. In what context would we not need it ?

so this is to separate the typing. eventually all data is passed to the webworker.

Types
*Input	do not need the type/info when using event targets on POS -> ExtensionRunner.run
*Input + BaseMetaInput	ExtensionRunner.run -> UnifiedExtensionWorker.run

[fatbattk]

Pausing since input not only represents the type for .run but also the input returned to partners via extensions(). BaseInput data must be returned to partners too.
Will revisit to split typing after OOO.