Add createFluentIcon support

[rbertels]

Hey Andrew,

This PR adds a binding to 'createFluentIcon`. (https://github.com/microsoft/fluentui-system-icons/blob/main/packages/react-icons/src/utils/createFluentIcon.ts)

It allows you to define your own icons based on SVG paths as such:

type [<Erase>] CustomIcons =
    static member inline microsoft (props : IIconProp list) =
        createElement (Fui.icon.createIconType("microsoft", "1em", [|
            "M1.0 1.0h7.5v7.5H1.0V1.0m9.0 0.0h7.5v7.5h-7.5V1.0m-9.0 9.0h7.5v7.5H1.0v-7.5m9.0 0.0h7.5v7.5h-7.5v-7.5"
        |])) props

The icon is then available to be used and customized like any other icon that is already available in the catalog.
Example usage:

navItem.icon (CustomIcons.microsoft [icon.size.``20``])

I just threw this function in Fui.icon but if you'd prefer it to be located somewhere else I'd be happy to move it around!
For the comments I tried to stay consistent with import.

Let me know what you think!

Have a nice day,

Rob

[sydsutton]

@rbertels Thanks for the PR! How would you feel about this instead? I think it's slightly more in-line with the original TS usage:

        /// Use this function to create new icons from SVG paths. <br/>
        /// See <link>https://github.com/microsoft/fluentui-system-icons/blob/main/packages/react-icons/src/utils/createFluentIcon.ts</link.
        ///
        /// Example:
        /// <code>
        ///     let microsoftIcon =
        ///         Fui.icon.createIconType(
        ///             "microsoft",
        ///             "1em",
        ///              [| "M1.0 1.0h7.5v7.5H1.0V1.0m9.0 0.0h7.5v7.5h-7.5V1.0m-9.0 9.0h7.5v7.5H1.0v-7.5m9.0 0.0h7.5v7.5h-7.5v-7.5" |],
        ///             [ icon.size.``20`` ]
        ///         )
        /// </code>
        static member inline createFluentIcon (displayName : string, width : string, paths : string array, props: IIconProp list) =
                        let icon = JSTuple.from3Args (displayName, width, paths) |> import "createFluentIcon" FluentIcons
                        createElement icon props

    let microsoftIcon (iconProps: IIconProp list) =
        Fui.icon.createFluentIcon (
            "microsoft",
            "1em",
            [| "M1.0 1.0h7.5v7.5H1.0V1.0m9.0 0.0h7.5v7.5h-7.5V1.0m-9.0 9.0h7.5v7.5H1.0v-7.5m9.0 0.0h7.5v7.5h-7.5v-7.5" |],
            iconProps
        )

    Fui.navItem [
        navItem.href ""
        navItem.icon (microsoftIcon [icon.size.``28``])
        navItem.value "1"
        navItem.children [
            Html.text "Dashboard"
        ]
    ]