Introduce enterprise license

LICENSE

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-The MIT License (MIT)
-
 Copyright (c) 2017-2021 Chatwoot Inc.
 
+Portions of this software are licensed as follows:
+
+* All content that resides under the "enterprise/" directory of this repository, if that directory exists, is licensed under the license defined in "enterprise/LICENSE".
+* All third party components incorporated into the Chatwoot Software are licensed under the original license provided by the owner of the applicable component.
+* Content outside of the above mentioned directories or restrictions above is available under the "MIT Expat" license as defined below.
+
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights

enterprise/LICENSE

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+The Chatwoot Enterprise license (the “Enterprise License”)
+Copyright (c) 2017-2021 Chatwoot Inc
+
+With regard to the Chatwoot 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 Chatwoot Subscription Terms of Service, available
+at https://www.chatwoot.com/terms-of-service/ (the “Enterprise Terms”), or other
+agreement governing the use of the Software, as agreed by you and Chatwoot,
+and otherwise have a valid Chatwoot Enterprise License for for the
+correct number of user seats. Subject to the foregoing sentence, you are free to
+modify this Software and publish patches to the Software. You agree that Chatwoot
+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 Chatwoot Enterprise subscription for the correct
+number of user seats. Notwithstanding the foregoing, you may copy and modify
+the Software for development and testing purposes, without requiring a
+subscription. You agree that Chatwoot 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.
+
+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 Chatwoot Software, those
+components are licensed under the original license provided by the owner of the
+applicable component.