Lettria (Independent Publisher) (#3020)

* Revert "Merge branch 'microsoft:dev' into dev"

This reverts commit 096a7c3199, reversing
changes made to cb0948670f.

* Revert "Merge branch 'microsoft:dev' into dev"

This reverts commit cb0948670f, reversing
changes made to dc26e8a026.

* Revert "Revert "Merge branch 'microsoft:dev' into dev""

This reverts commit 01764d0a6d.

* Revert "Revert "Merge branch 'microsoft:dev' into dev""

This reverts commit a3f086ef0f.

* Add files via upload

* Revert "Add files via upload"

This reverts commit eeff7b7a02.

* Add files via upload

* Delete independent-publisher-connectors/FileIO directory

* Add files via upload

* Add files via upload

* Add files via upload

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* Revert "Add files via upload"

This reverts commit 1d85506958.

* Update readme.md

* Revert "Update readme.md"

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* Add files via upload

independent-publisher-connectors/Lettria/apiProperties.json

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+{
+  "properties": {
+    "connectionParameters": {
+      "api_key": {
+        "type": "securestring",
+        "uiDefinition": {
+          "displayName": "API Key (in the form 'LettriaProKey API_Key')",
+          "description": "The API Key (in the form 'LettriaProKey API_Key') for this api",
+          "tooltip": "Provide your API Key (in the form 'LettriaProKey API_Key')",
+          "constraints": {
+            "tabIndex": 2,
+            "clearText": false,
+            "required": "true"
+          }
+        }
+      }
+    },
+    "iconBrandColor": "#da3b01",
+    "capabilities": [],
+    "publisher": "Troy Taylor",
+    "stackOwner": "Lettria"
+  }
+}

independent-publisher-connectors/Lettria/readme.md

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+# Lettria
+Whether you want to automate a manual task or gain insight from multiple documents, Lettria’s text analysis features are designed to find new opportunities in your data. Using the service, you can easily understand text data that is given as input to the service, using artificial intelligence and natural language processing.
+
+## Publisher: Troy Taylor, Hitachi Solutions
+
+## Prerequisites
+You will need to sign up for an account with [Lettria](https://app.lettria.com/signup).
+
+## Obtaining Credentials
+Once logged in to your Lettria, you can find your API Keys in the Use Your Project section.
+
+## Supported Operations
+### Comprehend text
+Retrieve the comprehension for the provided text.
+### Classify text
+Retrieve the classification for the provided text.
+
+## Known Issues and Limitations
+There are no known issues at this time.