Add extension recommendations, fix linting warnings, improve accessibility (#378)

* chore: add VS Code extension recommendations

* Update image URLs in README and documentation files

* chore: disable no-inline-html rule

* chore: use standard md/mdx syntax, and use .jsx for react components

* chore: fix email links in Code of Conduct

The commit message suggests fixing the email links in the Code of Conduct file to use the correct `mailto:` syntax.

* chore: update actix-web error helper links

Update the links to the `actix-web` error helper traits in the `databases.md` and `errors.md` files to use the correct URLs.

* chore: restore unused actix-web error helper links

* Update src/pages/community/coc.md

Co-authored-by: Rob Ede <robjtede@icloud.com>

* Update docs/getting-started.md

Co-authored-by: Rob Ede <robjtede@icloud.com>

---------

Co-authored-by: Rob Ede <robjtede@icloud.com>

docs/extractors.md

@@ -2,7 +2,7 @@
 title: Extractors
 ---
 
-import CodeBlock from "@site/src/components/code_block.js";
+import CodeBlock from "@site/src/components/code_block";
 
 # Type-safe information extraction