fix(website): misc improvements (#9940)

* refactor: use tokenRange for typeParams in heritage

* fix: correct type param replacement

* fix: ae config, link builtin in summary, `: | T` => `: T`, mainlib tsdoc

* fix: requested changes and tests

* chore: better deprecation messages and code cleanup

* fix: cleanup optional chainings

---------

Co-authored-by: Almeida <almeidx@pm.me>

packages/api-extractor/config/api-extractor.json

@@ -5,12 +5,12 @@
 
 	"apiReport": {
 		"enabled": true,
-		"reportFolder": "../../../common/reviews/api"
+		"reportFolder": "<projectFolder>/docs/review"
 	},
 
 	"docModel": {
 		"enabled": true,
-		"apiJsonFilePath": "../../../common/temp/api/<unscopedPackageName>.api.json"
+		"apiJsonFilePath": "<projectFolder>/docs/<unscopedPackageName>.api.json"
 	},
 
 	"dtsRollup": {