[ADF-1586] Added Core doc files (#2681)

* [ADF-1586] Added core doc files

* [ADF-1586] Added core doc files

docs/start-form.component.md

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+# Start Form component
+
+Displays the Start Form for a process.
+
+![Start Form screenshot](docassets/images/ProcessStartForm.png)
+
+## Basic Usage
+
+```html
+<adf-start-form
+    [processDefinitionId]="currentProcessDef.id"
+    (outcomeClick)="onOutcomeClick($event)">
+</adf-start-form>
+```
+
+### Properties
+
+| Name | Type | Default | Description |
+| --- | --- | --- | --- |
+| processDefinitionId | string |  | Definition ID of the process to start. |
+| processId | string |  | Process ID of the process to start. |
+| showOutcomeButtons | boolean | true | Should form outcome buttons be shown? |
+| showRefreshButton | boolean | true |  |
+| readOnlyForm | boolean | false | Is the form read-only (ie, can't be edited)? |
+
+### Events
+
+| Name | Description |
+| --- | --- |
+| outcomeClick | Emitted when the user clicks one of the outcome buttons that completes the form. |
+
+## Details
+
+The [Start Process component](start-process.component.md) uses the Start Form component
+to display the
+[start form](http://docs.alfresco.com/process-services1.6/topics/none_start_event.html)
+for the process.
+
+The `outcomeClick` event is passed a string containing the ID of the outcome button that
+the user clicked. You can pass this value to the `startProcess` method (defined in the
+[Process service](process.service.md)) when activating the process, if necessary.
+
+<!-- Don't edit the See also section. Edit seeAlsoGraph.json and run config/generateSeeAlso.js -->
+<!-- seealso start -->
+
+<!-- seealso end -->