Improves the layout on the create blueprint dialog

[AndyButland]

Description

Noticed in testing functionality related to blueprints that the dialog isn't really styled very well. This updates it to match other similar screens.

Before:

After:

[Copilot]

Pull Request Overview

Refactors the Create Blueprint modal to use the standardized body/box layouts and property layout for the blueprint name field, aligning its styling with other dialogs.

• Inlines rendering of the blueprint name field into the main render() method.
• Wraps the name input in umb-property-layout and removes the old #renderBlueprintName helper.
• Updates the modal headline and box structure to match other similar screens.

Comments suppressed due to low confidence (2)

src/Umbraco.Web.UI.Client/src/packages/documents/documents/entity-actions/create-blueprint/modal/create-blueprint-modal.element.ts:44

• [nitpick] The id "tree-box" doesn't reflect this component's purpose. Consider renaming it to something like "blueprint-box" or "create-blueprint-box" for clarity.

<uui-box id="tree-box" headline="Create a new Content Template from ${this._documentName}">

src/Umbraco.Web.UI.Client/src/packages/documents/documents/entity-actions/create-blueprint/modal/create-blueprint-modal.element.ts:50

• The uui-input label attribute is redundant when wrapped by umb-property-layout, which already provides the field label. You can remove the label prop to avoid duplicate labeling.

label="name"

[madsrasmussen]

Changes look good 👍

FYI: I have localized the texts in the modal.