build(aio): improve accuracy of code auto-linking (#22494)

The new version of `dgeni-packages/typescript` no longer strips
out "namespaces" from types, which was part of the problem of
not autolinking correctly to `HttpEventType.Response`.

Another part of the problem was that we did not include `.`
characters when matching potential code blocks for auto-linking,
which precluded properties of enums from being linked.

Finally, members we not being given a `path` property, which is
needed to effectively autolink to them. This is now set in
the `simplifyMemberAnchors` processor.

Closes #21375

PR Close #22494

aio/tools/transforms/angular-base-package/post-processors/auto-link-code.js

@@ -45,7 +45,7 @@ module.exports = function autoLinkCode(getDocFromAlias) {
                 parent.children.splice(index, 1, createLinkNode(docs[0], node.value));
               } else {
                 // Parse the text for words that we can convert to links
-                const nodes = textContent(node).split(/([A-Za-z0-9_-]+)/)
+                const nodes = textContent(node).split(/([A-Za-z0-9_.-]+)/)
                   .filter(word => word.length)
                   .map((word, index, words) => {
                     // remove docs that fail the custom filter tests