[type-summarizer] reimplement for broader support (#135163)

* [type-summarizer] reimplement for broader support

* Enable sourceMaps in all packages

* include naming collision in summarizePackage test

* fix readmes

* remove unnecessary transient dependency

* remove code that was commented out

* remove outdated todo comment

* ensure errors triggered by untyped-exports are ligible

* remove unused import

* break out snippet generation from AstIndexer

* refactor several massive files into smaller pieces and add more inline docs

* fix typos

* update jest snapshots

* add sections to readme that points people to the useful parts of the source code along with a high-level overview of how the type-summarizer works

* remove --dump flag, it doesn't work

* use decName instead of calling names.get a second time

* include `export` as invalid name

packages/kbn-datemath/BUILD.bazel

@@ -49,6 +49,7 @@ ts_project(
   srcs = SRCS,
   deps = TYPES_DEPS,
   declaration = True,
+  declaration_map = True,
   emit_declaration_only = True,
   out_dir = "target_types",
   root_dir = "src",

packages/kbn-datemath/tsconfig.json

@@ -2,6 +2,7 @@
   "extends": "../../tsconfig.bazel.json",
   "compilerOptions": {
     "declaration": true,
+    "declarationMap": true,
     "emitDeclarationOnly": true,
     "outDir": "target_types",
     "rootDir": "src",