Fiddle: stop rendering raw html in markdown

[krishan711]

Description

Screenshots:

Checklist:

• I have updated the CHANGELOG with a summary of my changes
• I have updated the documentation accordingly

[Copilot]

Pull request overview

This PR updates the markdown rendering components to stop parsing raw HTML by default while allowing explicit opt-in for HTML parsing on the main Markdown component, and documents the new behavior in the changelog.

Changes:

• Add disableParsingRawHTML to MarkdownText so inline markdown never parses raw HTML.
• Add a new shouldEnableHtmlParsing prop to Markdown and wire it to markdown-to-jsx’s disableParsingRawHTML option (HTML disabled by default).
• Update the changelog to record the new Markdown prop and behavior.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/molecules/markdownText/component.tsx	Forces MarkdownText to disable raw HTML parsing, but currently conflicts with its newline handling strategy.
src/molecules/markdown/component.tsx	Introduces shouldEnableHtmlParsing and disables raw HTML parsing by default in the core Markdown renderer.
CHANGELOG.md	Documents the addition of shouldEnableHtmlParsing on Markdown under the Unreleased/Changed section.

[Copilot]

Setting disableParsingRawHTML: true here breaks the existing newline handling logic, since content is built using literal <br/> tags (see the source.replace call above) and markdown-to-jsx will now render those as plain text rather than line breaks. To preserve the current visual behavior while disabling raw HTML, the newline transformation should be updated to avoid injecting <br/> (e.g. rely only on markdown line-break syntax or another non-HTML approach) so that the WithNewlines story and other multiline content do not show raw <br/> characters in the UI.