[AUTOMATIC] Release/10.18.0 (#4033)

**This is an automatic release.**

## RevenueCat SDK
### ✨ New Features
* Track checkpoint hits through the analytics events pipeline (#3994)
via Cesar de la Vega (@vegaro)
* Add public Purchases.showManageSubscriptions() API (#3434) via Facundo
Menzella (@facumenzella)
* feat(ads): ad reward tracking with admob adapter (#3885) via Peter
Porfy (@peterporfy)

## RevenueCatUI SDK
### Paywallsv2
#### 🐞 Bugfixes
* Fix product change mode in workflow paywalls (#4016) via Cesar de la
Vega (@vegaro)
* Fix font scaling setting on workflow paywalls (#3977) via Cesar de la
Vega (@vegaro)

### 🔄 Other Changes
* build(deps): bump fastlane from 2.237.0 to 2.238.0 (#3979) via
dependabot[bot] (@dependabot[bot])
* build(deps): bump fastlane-plugin-revenuecat_internal from `7fbbe66`
to `7dd9ab9` (#4025) via dependabot[bot] (@dependabot[bot])
* feat(checkpoints): Add the app's subscriber attributes as a rules
dimension (#3996) via Toni Rico (@tonidero)
* Announce a public API change in the SDK API feed once per PR (#3991)
via Álvaro Brey (@AlvaroBrey)
* feat(checkpoints): Add date and record collection rules dimension
values (#3978) via Toni Rico (@tonidero)

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Diff is limited to version strings, changelog, and docs deploy paths;
functional changes were merged separately and are only summarized here.
> 
> **Overview**
> **Automatic release** that finalizes **10.18.0** by dropping
`-SNAPSHOT` across `gradle.properties`, `.version`,
`Config.frameworkVersion`, example apps, and docs deploy config
(CircleCI S3 sync now targets `10.18.0`).
> 
> Changelog and `docs/index.html` are updated to document what ships in
this release (already merged on the release branch): **Purchases**
checkpoint analytics, public `showManageSubscriptions()`, AdMob
ad-reward tracking; **RevenueCatUI** workflow paywall fixes for product
change mode and font scaling; plus checkpoint rules dimensions and
tooling bumps listed under Other Changes.
> 
> No new feature implementation in this diff—only release metadata and
publishing alignment.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
fa21f3122d627fc1e183072a66aa555d43c61a29. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->