Add new boolean operators

[stephenquan]

Document the new boolean operators that are being introduced in CommunityToolkit/Maui#2181

Here are the new operators / constants being documented:

• New conditional operator: ? :
• New boolean logical operators: && || (alternates: and or)
• New equality operators: == !=
• New comparison operators: >= > <= < (alternates: ge gt le lt)
• Negate operator: !
• New constants: true or false

Document differences these operators look between C# and XAML (because of XAML escaping).

By XAML escaping I mean that && in XAML looks like && and >= in XAML looks like >=.

To make it developers to use these operators in either C# and XAML, alternate English-only operators were also given.

Also, because the XAML escaping didn't render correctly, it was necessary to put code escpaing on all operators. i.e. even the existing operators needed to be escaped. This caused most of the file to be updated even though only a handful of new operators were introduced.

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[stephenquan]

@microsoft-github-policy-service agree company="Esri"

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[stephenquan]

@jfversluis @TheCodeTraveler do you know who may be able to review this documentation PR?

[bijington]

I'll sort this 👍

[bijington]

@stephenquan thank you for this update. I have just added one comment, please let me know what you think

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[bijington]

Thank you @stephenquan

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[stephenquan]

Hi @bijington, can we merge/push this doc update? Members of my team are bookmarking this unmerged doc PR as a reference since the public doc is behind.

[bijington]

I don't have the power but @jfversluis does

[jfversluis]

This change has not been merged and released in the toolkit, right?

[TheCodeTraveler]

We merged the PR on January 16 and Released it on January 17

Assuming this Docs PR is approved and nothing is blocking it, it should be merged.

[jfversluis]

Ah the proposal was still open thats why I thought it was still ongoing! Lets do it!