refactor: Cal.diy (#28903)

* feat: Cal.diy — community-driven MIT-licensed fork of Cal.com

This squashed commit contains all Cal.diy changes applied on top of calcom/cal.com main:

- Rebrand Cal.com to Cal.diy across the entire codebase
- Remove Enterprise Edition (EE) features, license checks, and AGPL restrictions
- Switch license from AGPL-3.0 to MIT
- Remove docs/ directory (migrated to Nextra at cal.diy)
- Remove dead code: org tests, EE tips, platform nav, premium username, SAML/SSO, etc.
- Clean up .env.example for self-hosted Cal.diy
- Update Docker image references to calcom/cal.diy
- Update README, CONTRIBUTING.md, and issue templates for Cal.diy community fork
- Add PR welcome bot for Cal.diy contributors
- Fix API v2 breaking changes oasdiff ignore entries
- Replace Blacksmith CI runners with default GitHub Actions

3893 files changed, 20789 insertions(+), 411020 deletions(-)

Co-Authored-By: benny@cal.com <sldisek783@gmail.com>

* refactor: remove org-specific /organizations/:orgId endpoints from API v2 atoms controllers (#1701)

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* fix: revert Cal.diy Inc to Cal.com, Inc. in license files, copyright notices, and package metadata (#1702)

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* rip out org related comments in api v2

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

packages/app-store/pipedrive-crm/config.json

@@ -8,7 +8,7 @@
   "variant": "crm",
   "categories": ["crm"],
   "extendsFeature": "EventType",
-  "publisher": "Cal.com",
+  "publisher": "Cal.diy",
   "email": "support@cal.com",
   "description": "Founded in 2010, Pipedrive is an easy and effective sales CRM that drives small business growth.\r\rToday, Pipedrive is used by revenue teams at more than 100,000 companies worldwide. Pipedrive is headquartered in New York and has offices across Europe and the US.\r\rThe company is backed by majority holder Vista Equity Partners, Bessemer Venture Partners, Insight Partners, Atomico, and DTCP.\r\rLearn more at www.pipedrive.com.",
   "isTemplate": false,