Adding my screenshots to right assets folder (for UI Components)

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[gibson042]

Please also include fixes https://github.com/Agoric/documentation/pull/1077#discussion_r1593376525 and https://github.com/Agoric/documentation/pull/1077#discussion_r1593376673 , and https://github.com/Agoric/documentation/pull/1077#discussion_r1593376283 if you can (although I think that last one depends upon some other PR).

--- main/guides/UIComponentLibrary/UIComponentsstart.md
+++ main/guides/UIComponentLibrary/UIComponentsstart.md
@@ -43,7 +43,7 @@ Before getting started, there are some resources you might want to keep handy in
 Customizable Parameters
 | Parameter | Type | Description |
 |----------|----------|----------|
-| ClassName   | string   | CSS class name for the underlying <button> element   |
+| ClassName   | string   | CSS class name for the underlying \<button> element   |

 ## Wallet Provisioning

@@ -69,7 +69,7 @@ Customizable Parameters
 |----------|----------|----------|
 | value   | bigint | null   | The current value of the input   |
 | decimalPlace   | number   | The number of decimal places used for displaying the denominated value   |
-| className   | string | undefined   | CSS class name for the underlying <input> element   |
+| className   | string | undefined   | CSS class name for the underlying \<input> element   |
 | onChange   | undefined | (value: bigint) => void   | Callback for handling input changes   |
 | disabled   | boolean | undefined   | Whether or not the input is disabled. Defaults to false.   |

[dckc]

Also, rename UIComponentsstart.md to index.md

Be sure to familiarize yourself with contributing guidelines. In particular, the section on README / index files.