Add role to `svg` element

Rule ID	Image 8
Conformance	Required
Definition	`svg` element must define an appropriate ARIA role that describes it's purpose.
Purpose	An `svg` element has the default role of `graphics-document`. The `graphics-*` roles are not well implemented in browsers or assistive technologies at this time, so the role needs to be overrided by the author with a role that appropriately identifies the purpose of the `svg` element.
Conformance	Required
WCAG Success Criteria	Success Criterion 4.1.2 Name, Role, Value Other Related Success Criterion: Success Criterion 1.1.1 Non-text Content
Rule Category	Images
Rule Scope	Element
First Step	no
Techniques	Add `role="img"` attribute if the `svg` element is a descriptive image (most likely). When the `img` role is used the svg `title` element can be used to provide a text equivalent. Add `role="none"` attribute if the `svg` element is a decorative image. Add an appropriate ARIA role if the `svg` is interactive or can be represented by some other document role. For example a `table` roles if the svg content represents tabular data.
Information Links	Scalable Vector Graphics (SVG) 2 SVG Accessibility API Mappings deque: Creating Accessible SVGs A11Y-101: Accessible SVGs

Add role to svg element