feat: add license and readme about copyright

LICENSE

@@ -0,0 +1,42 @@
+The Cal.com Enterprise Edition (EE) license (the “EE License”)
+Copyright (c) 2020-present Cal.com, Inc
+
+With regard to the Cal.com Software:
+
+This software and associated documentation files (the "Software") may only be
+used in production, if you (and any entity that you represent) have agreed to,
+and are in compliance with, the Cal.com Subscription Terms available
+at https://cal.com/terms (the “EE Terms”), or other agreements governing
+the use of the Software, as mutually agreed by you and Cal.com, Inc ("Cal.com"),
+and otherwise have a valid Cal.com Enterprise Edition subscription ("EE Subscription")
+for the correct number of hosts as defined in the EE Terms ("Hosts"). Subject to the foregoing sentence,
+you are free to modify this Software and publish patches to the Software. You agree
+that Cal.com and/or its licensors (as applicable) retain all right, title and interest in
+and to all such modifications and/or patches, and all such modifications and/or
+patches may only be used, copied, modified, displayed, distributed, or otherwise
+exploited with a valid EE Subscription for the correct number of hosts.
+Notwithstanding the foregoing, you may copy and modify the Software for development
+and testing purposes, without requiring a subscription. You agree that Cal.com and/or
+its licensors (as applicable) retain all right, title and interest in and to all such
+modifications. You are not granted any other rights beyond what is expressly stated herein.
+Subject to the foregoing, it is forbidden to copy, merge, publish, distribute, sublicense,
+and/or sell the Software.
+
+This EE License applies only to the part of this Software that is not distributed under
+the AGPLv3 license. Any part of this Software distributed under the MIT license or which
+is served client-side as an image, font, cascading stylesheet (CSS), file which produces
+or is compiled, arranged, augmented, or combined into client-side JavaScript, in whole or
+in part, is copyrighted under the AGPLv3 license. The full text of this EE License shall
+be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+For all third party components incorporated into the Cal.com Software, those
+components are licensed under the original license provided by the owner of the
+applicable component.

README.md

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-# Cal.com Public API (Enterprise Only)
+<!-- PROJECT LOGO -->
+<div align="center">
+  <a href="https://cal.com/enterprise">
+    <img src="https://user-images.githubusercontent.com/8019099/133430653-24422d2a-3c8d-4052-9ad6-0580597151ee.png" alt="Logo">
+  </a>
+  
+  <a href="https://cal.com/enterprise">Get Started with Enterprise</a>
+</div>
+
+# Cal.com Public API - Enterprise Edition
+
+Welcome to the Public API Enterprise Edition ("/apps/api") of the Cal.com Public API.
+
+The [/apps/api](https://github.com/calcom/cal.com/tree/main/apps/api) subfolder is the place for our Public API, which we serve at api.cal.com, and enterprise customers can also run [enterprise-grade](https://cal.com/enterprise)
+
+> _❗ WARNING: This repository is copyrighted (unlike our [main repo](https://github.com/calcom/cal.com)). You are not allowed to use this code to host your own version of app.cal.com without obtaining a proper [license](https://cal.com/pricing?infra) first❗_
 
 This is the public REST api for cal.com.
 It exposes CRUD Endpoints of all our most important resources.