Fixes gh-13399

This commit regroups the documentation on how to configure a web server
in Spring Boot. The same concepts apply, whether the server is
Tomcat/Netty/Jetty/Undertow, or if it's deployed for a Servlet or
Reactive web application.

Closes gh-13315

Prior to this commit, the `DefaultErrorWebExceptionHandler` would parse
the HTTP "Accept" headers when routing the request to the error handler;
if an error occured during parsing, an `InvalidMediaTypeException` would
be thrown and break the error handling for this request.

This commit ignores those exceptions and makes sure that the error
handling function does not override the response status or the error
itself with those exceptions.

Closes: gh-13372

Closes gh-1327

Closes gh-13397

Closes gh-13396

Closes gh-13395

Closes gh-13394

Closes gh-13393

Closes gh-13392

Closes gh-13391

Closes gh-13390

Closes gh-13389

Closes gh-13387

Closes gh-13386

Closes gh-13385

Closes gh-13384

Closes gh-13383

Closes gh-13382

Closes gh-10933

Closes gh-13368

* pr/13378:
  Polish "Replace commons-codec Base64 usage"
  Replace commons-codec Base64 usage

Closes gh-13378

See gh-13378

Update `TomcatResources` so that `META-INF/resources` folders in
`src/main/resources` no longer fail with a "URI is not hierarchical"
exception.

Closes gh-13265

Closes gh-13083

As of https://jira.spring.io/browse/SPR-16381, Spring Framework now
supports both gzip and Brotli as compression formats for static
resources resolved by the resource chain.

The `GzipResourceResolver` has been deprecated and replaced by the
`EncodedResourceResolver`. This commit uses this new resolver and adapts
the configuration key to reflect those changes.

Note that this resolver is now configured ahead of the
`VersionResourceResolver`.

Closes gh-13242

* pr/13364:
  Use Duration in HttpWebServiceMessageSenderBuilder