Merge pull request #3157 from SDA-SE/feat/formatted-react-markdown

feat: add MarkdownContent component to @backstage/core

.changeset/3157.md

@@ -0,0 +1,16 @@
+---
+'@backstage/core': patch
+---
+
+Adds the MarkdownContent component to render and display Markdown content with the default
+[GFM](https://github.github.com/gfm/) (Github flavored Markdown) dialect.
+
+```
+<MarkdownContent content={markdownGithubFlavored} />
+```
+
+To render the Markdown content with plain [CommonMark](https://commonmark.org/), set the dialect to `common-mark`
+
+```
+<MarkdownContent content={markdown} dialect='common-mark />
+```