Add "Window to Visual" in "Windowed vs. Visual hosting of WebView2"

[johna-ms]

Rendered article for review:

• Windowed vs. visual hosting of WebView2
  • https://review.learn.microsoft.com/microsoft-edge/webview2/concepts/windowed-vs-visual-hosting?branch=pr-en-us-3271
  • Before/Live
  • Publicizes a new hosting mode: Window to Visual hosting.
  • Simplified the article structure by removing API list sections & instead linking to "Overview of APIs" sections.

Outline of headings:

# Windowed vs. Visual hosting of WebView2
(Intro)

## Windowed hosting: For displaying content quickly and easily
#### Advantages
#### Disadvantages
#### APIs for Windowed hosting

## Window to Visual hosting: For a similar experience as Windowed hosting, with added benefits and tradeoff
#### Advantages
#### Disadvantages
#### APIs for Window to Visual hosting

## Visual hosting: For more granular control over layout
#### Requirements for scaling the contents
#### Requirements for routing spatial inputs (mouse, touch, or pen)
#### Advantages and disadvantages
#### APIs for Visual hosting

## Compatibility and constraints
#### Operating systems
#### Framework constraints

## See also

Previous outline of headings in initial version of this PR:

=======================================
## Scenarios for selecting the hosting approach
#### Windowed hosting: For displaying content quickly and easily
###### Advantages
###### Disadvantages

#### Window to Visual hosting: Similar experience as Windowed hosting with added benefits and tradeoff
###### Advantages
###### Disadvantages

#### Visual hosting: For more granular control over layout
###### Advantages and disadvantages

=======================================
## Compatibility and constraints
#### Operating systems
#### Rendering WebView2 in framework and non-framework apps    [APIs tabset]

=======================================
## Windowed hosting and Window to Visual hosting
#### Benefits of Windowed hosting
#### Benefits of Window to Visual hosting
#### APIs for Windowed hosting and Window to Visual hosting
###### Window management                          [APIs tabset]
###### Sizing, positioning, and visibility        [APIs tabset] child
###### Zooming                                    [APIs tabset] child
###### Rasterization scale                        [APIs tabset]
###### Focus and tabbing                          [APIs tabset]
###### Parent window                              [APIs tabset]
###### Keyboard accelerators                      [APIs tabset]
###### Default background color                   [APIs tabset]

=======================================
## Visual hosting
#### APIs for Visual hosting
###### Composition-based rendering                [APIs tabset]
###### Output                                     [APIs tabset]
###### Input                                      [APIs tabset]
###### Accessibility                              [APIs tabset]

=======================================
## See also

AB#53976497

[mikehoffms]

LGTM - Writer/Editor

[champnic]

Small comments, but otherwise LGTM. Approved by Dev

[johna-ms]

LGTM | Dev

[learn-build-service-prod]

Learn Build status updates of commit 918a03e:

✅ Validation status: passed

File	Status	Preview URL	Details
microsoft-edge/toc.yml	✅Succeeded	View
microsoft-edge/webview2/concepts/windowed-vs-visual-hosting.md	✅Succeeded	View

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