Adopt new storage pickers from WinAppSDK 1.8 (#2044)

## Description
**Main changes:**
* Upgrade WinAppSDK package in **WinUIGallery** project to **1.8**
* Rename **File Picker** page to **Storage pickers** page for accuracy
(covers file & folder pickers)
* Rename corresponding sample image
* Add new examples with available picker options:
    * pick single file,
    * pick multiple files,
    * save file,
    * and pick folder
* Include a note explaining `SuggestedStartLocation` and `ViewMode`
behavior
* Update **RichEditBox** (3rd example) to use the new **Storage
Pickers** APIs
* Remove obsolete sample code files

## Motivation and Context
- Closes #2043 

## How Has This Been Tested?
Manually tested

## Screenshots (if appropriate):
<img width="1426" height="746" alt="image"
src="https://github.com/user-attachments/assets/64a314cc-3b16-41c8-8047-00e5a386b46b"
/>
<img width="1432" height="751" alt="image"
src="https://github.com/user-attachments/assets/8a8011fc-9c00-4c7a-9453-f5ab17f93f0e"
/>
<img width="1434" height="753" alt="image"
src="https://github.com/user-attachments/assets/8114d077-c23d-40bc-9337-23ba3495a134"
/>

## Types of changes
<!--- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)

---------

Co-authored-by: Niels Laute <niels.laute@live.nl>
Co-authored-by: Marcel Wagner <marcelwagner@microsoft.com>

Update control descriptions for consistency (#1863)

<!--- Provide a general summary of your changes in the Title above -->

## Description
<!--- Describe your changes in detail -->
Capitalized some control names in their descriptions.

## Motivation and Context
<!--- Why is this change required? What problem does it solve? -->
<!--- If it fixes an open issue, please link to the issue here. -->

## How Has This Been Tested?
<!--- Please describe in detail how you tested your changes. -->
<!--- Include details of your testing environment, and the tests you ran
to -->
<!--- see how your change affects other areas of the code, etc. -->
Ran the app and confirmed the changes.

## Screenshots (if appropriate):

## Types of changes
<!--- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)

Update Version Info to 2.5.1 (#1704)

Update WinUI-Gallery Version to 2.5.1

Update Gallery and WindowsAppSDK Version (#1652)

## Description
- Update Gallery Version to 2.5.0
- WindowsAppSDK Version to 1.6.241106002

Update Version 2.4.3 (#1570)

<!--- Provide a general summary of your changes in the Title above -->

## Description
<!--- Describe your changes in detail -->

- Change version number from 2.4.2.1 - #1568  to 2.4.3
- Turns out you can't have a non-zero revision number on Store

update version

Update Version to 2.4.1.0 (#1475)

Update version to 2.4.1.0

Adding a MapControl page in the Media section (#1466)

## Description
Adds a MapControl page to the app

## Motivation and Context
MapControl was in introduced in WinAppSDK 1.5 and this page demonstrates
how to use the control.

## How Has This Been Tested?
Ad-hoc testing running app locally.

## Screenshots (if appropriate):

![image](https://github.com/microsoft/WinUI-Gallery/assets/7658216/6595954f-7639-4546-bcc8-24f31b0cfb47)

Co-authored-by: bkudiess <barbara.kudiess@microsoft.com>
Co-authored-by: Niels Laute <niels.laute@live.nl>
Co-authored-by: Karen Lai <biilai@microsoft.com>

Add minimum window sizes (#1404)

## Description
Adding a minimum size for the apps window and also the TabView tearout
sample for better user experience.

## Motivation and Context
Closes #1181

Co-authored-by: Niels Laute <niels.laute@live.nl>

WinUI Gallery 2.2.0.0 Release (#1353)