feat(docs): ✨ add images for Show-PesterResult and Show-PesterResultTree

* Added screenshots to enhance documentation for `Show-PesterResult` and `Show-PesterResultTree`.
* Updated README.md to include visual references for better user understanding.

Author: HeyItsGilbert

README.md

@@ -29,6 +29,8 @@ $pester = Invoke-Pester .\tests\ -PassThru
 Show-PesterResult $p
 ```
 
+![](images\Show-PesterResult.png)
+
 You can also get a tree view of your pester results with
 `Show-PesterResultTree`.
 
@@ -39,6 +41,8 @@ $pester = Invoke-Pester .\tests\ -PassThru
 Show-PesterResultTree $p
 ```
 
+![](images\Show-PesterResultTree.png)
+
 ## Contributing
 
 Please read the Contributors guidelines.