docs: challenge, events, oss update (#2058)

new 1M challenge terms, new event terms, fair share program terms
removal, updating affiliate terms

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Adds $1M Challenge and Event Terms, introduces a Community Code of
Conduct, updates Affiliate Terms with OSS Fair Share addendum and
renumbering, and archives the old Fair Share Program terms.
> 
> - **Legal — New documents**:
> - **Challenge Terms**: Adds
`sources/legal/latest/terms/challenge-terms-and-conditions.md` (Apify
$1M Challenge; eligibility, actor requirements, rewards, payouts,
general terms).
> - **Event Terms**: Adds
`sources/legal/latest/terms/event-terms-and-conditions.md`
(registration, payments, changes/cancellations, conduct, liability,
privacy, jurisdiction).
> - **Community Code of Conduct**: Adds
`sources/legal/latest/policies/community-code-of-conduct.md` (standards,
AI content use, enforcement, contacts, legal notices, data retention).
> - **Legal — Updates**:
> - **Affiliate Program Terms**
(`sources/legal/latest/terms/affiliate-program-terms-and-conditions.md`):
>     - Normalizes numbered clauses; adjusts sidebar position.
> - Adds new section `## 8. Apify Open Source Fair Share Program
Additional Terms` (GitHub Sponsors payouts, automatic attribution from
OSS Actor pages).
>     - Renumbers termination and amendments to `## 9` and `## 10`.
>   - **Candidate Referral Program**: Updates sidebar position metadata.
> - **Legal — Archival**:
> - Moves/marks Open Source Fair Share Program Terms as outdated:
`sources/legal/old/fair-share-program-terms-and-conditions.md` (updated
description, slug moved under `/old/`, explicit “no longer effective”
notice).
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
a3e3487. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

---------

Co-authored-by: Ondra Urban <[email protected]>

Author: lenkab151

sources/legal/index.mdx

@@ -38,7 +38,7 @@ Apify Trust Center: https://trust.apify.com/<br/>
 - [Apify Store Publishing Terms and Conditions](./latest/terms/store-publishing-terms-and-conditions.md)
 - [Apify Affiliate Program Terms and Conditions](./latest/terms/affiliate-program-terms-and-conditions.md)
 - [Apify Data Processing Addendum](./latest/terms/data-processing-addendum.md)
-- [Apify Open Source Fair Share Program Terms and Conditions](./latest/terms/fair-share-program-terms-and-conditions.md)
+- [Apify Event Terms and Conditions](./latest/terms/event-terms-and-conditions.md)
 - [Apify Candidate Referral Program Terms](./latest/terms/candidate-referral-program-terms-and-conditions.md)
 
 ## Policies
@@ -48,3 +48,4 @@ Apify Trust Center: https://trust.apify.com/<br/>
 - [Apify Cookie Policy](./latest/policies/cookie-policy.md)
 - [Apify GDPR Information](./latest/policies/gdpr-information.md)
 - [Apify Whistleblowing Policy](./latest/policies/whistleblowing-policy.md)
+- [Apify Community Code of Conduct](./latest/policies/community-code-of-conduct.md)