Gather analyzer package API references in a facade class.

[pq]

Part of the effort to manage analyzer dependencies.

See: #57427 .

[pq]

dart-archive/linter#395 gets us most of the way there.

Still TODO:

INFO: Don't import implementation files from another package. ([linter] lib/src/rules/public_member_api_docs.dart:11)
INFO: Don't import implementation files from another package. ([linter] lib/src/rules/pub/package_names.dart:8)
INFO: Don't import implementation files from another package. ([linter] lib/src/rules/unnecessary_brace_in_string_interp.dart:10)
INFO: Don't import implementation files from another package. ([linter] lib/src/rules/annotate_overrides.dart:11)
INFO: Don't import implementation files from another package. ([linter] lib/src/rules/empty_constructor_bodies.dart:9)
INFO: Don't import implementation files from another package. ([linter] lib/src/rules/package_prefixed_library_names.dart:12)
INFO: Don't import implementation files from another package. ([linter] lib/src/rules/package_prefixed_library_names.dart:10)
INFO: Don't import implementation files from another package. ([linter] lib/src/rules/package_api_docs.dart:10)
INFO: Don't import implementation files from another package. ([linter] lib/src/rules/empty_catches.dart:9)
INFO: Don't import implementation files from another package. ([linter] lib/src/formatter.dart:11)
INFO: Don't import implementation files from another package. ([linter] lib/src/formatter.dart:14)
INFO: Don't import implementation files from another package. ([linter] lib/src/formatter.dart:12)
INFO: Don't import implementation files from another package. ([linter] lib/src/ast.dart:41)
INFO: Don't import implementation files from another package. ([linter] lib/src/rules/no_duplicate_case_values.dart:13)
INFO: Don't import implementation files from another package. ([linter] lib/src/rules/no_duplicate_case_values.dart:16)
INFO: Don't import implementation files from another package. ([linter] lib/src/rules/no_duplicate_case_values.dart:15)
INFO: Don't import implementation files from another package. ([linter] lib/src/rules/no_duplicate_case_values.dart:14)
INFO: Don't import implementation files from another package. ([linter] lib/src/rules/no_duplicate_case_values.dart:17)

which are trickier since they reach into tokens and the resolver.