[3.7.0] Documentation for the Signature component (#1187)

* docs(signature): first commit

* docs(signature): documentation

* chore(config): update the config file

* docs(input-validation): sort the components in alphabetical order

* docs(input-validation): add the signature component

* docs(overview): add a link to input validation

* docs(overview): polishing

* docs(signature): small fixes in overview and appearance articles

* docs(signature): fixes in see also articles

* Update components/signature/overview.md

Co-authored-by: Dimo Dimov <961014+dimodi@users.noreply.github.com>

* Update components/signature/overview.md

Co-authored-by: Dimo Dimov <961014+dimodi@users.noreply.github.com>

* Update components/signature/overview.md

Co-authored-by: Dimo Dimov <961014+dimodi@users.noreply.github.com>

* Update components/signature/overview.md

Co-authored-by: Dimo Dimov <961014+dimodi@users.noreply.github.com>

* Update components/signature/appearance.md

Co-authored-by: Dimo Dimov <961014+dimodi@users.noreply.github.com>

* docs(signature): explain better the Size

* docs(overview): improvements

* Update components/signature/appearance.md

Co-authored-by: Dimo Dimov <961014+dimodi@users.noreply.github.com>

* docs(appearance): remove the float left style

* Update components/signature/events.md

Co-authored-by: Dimo Dimov <961014+dimodi@users.noreply.github.com>

Co-authored-by: Dimo Dimov <961014+dimodi@users.noreply.github.com>

Author: svdimitr

_config.yml

@@ -404,6 +404,8 @@ navigation:
         title: "Scheduler"
      "*scrollview":
         title: "ScrollView"
+     "*signature":
+        title: "Signature"
      "*slider":
         title: "Slider"
      "*skeleton":
@@ -523,6 +525,7 @@ intro_columns:
       "Numeric Textbox": "components/numerictextbox/overview"
       "Radio Button Group": "radiogroup-overview"
       "RangeSlider": "rangeslider-overview"
+      "Signature": "signature-overview"
       "Slider": "slider-overview"
       "Switch": "switch-overview"
       "TextArea": "textarea-overview"