Remove mentions of Macros to render Umbraco Forms

[sofietoft]

Description

I've updated the "Render Forms" article by removing the macro section.
I've updated the "Themes article" by linking to the "Rendering Forms" article instead of the example using Macros.

Type of suggestion

• Typo/grammar fix
• Updated outdated content
• New content
• Updates related to a new version
• Other

Product & version (if relevant)

Forms - 14

[AndyButland]

Looks great, but I'm just wondering if the additionalData feature (relatively recently added, and only needed in a minority of use cases) might confuse things a bit.

So perhaps:

• Remove the line "This example also adds magic strings replacements using the additionalData parameter."
• Update the first code sample to be:

@await Component.InvokeAsync("RenderForm", new { formId = @Model.Form, theme = @Model.Theme, includeScripts = false })

• And then at the end of the section, after the list presented under "Six parameters can be provided" where the additionalData parameter is the last to be discussed, add one more example:

---

The following example shows how the additionalData parameter is used:

var additionalData = new Dictionary<string, string> { { "foo", "bar" }, { "buzz", "baz" } };
@await Component.InvokeAsync("RenderForm", new { formId = @Model.Form, theme = @Model.Theme, includeScripts = false, additionalData })

---

[sofietoft]

I think that sounds great @AndyButland 💪

I've updated the article based on your suggestion.
I'll merge it once the checks clears 🙌