Add exploreTree script for inspecting tree bundle content (#23490)

## Description

Add a script to make using my preferred tool for attributing bundle
content, source-map-explorer, easier.

examples/utils/bundle-size-tests/package.json

@@ -22,6 +22,7 @@
 		"clean": "rimraf --glob dist lib bundleAnalysis \"**/*.tsbuildinfo\" \"**/*.build.log\"",
 		"eslint": "eslint --format stylish src",
 		"eslint:fix": "eslint --format stylish src --fix --fix-type problem,suggestion,layout",
+		"explore:tree": "npm run build && npm run webpack && source-map-explorer ./dist/sharedTree.js --html bundleAnalysis/reportTree.html",
 		"format": "npm run format:biome",
 		"format:biome": "biome check . --write",
 		"format:prettier": "prettier --write . --cache --ignore-path ../../../.prettierignore",
@@ -59,6 +60,7 @@
 		"prettier": "~3.0.3",
 		"puppeteer": "^23.6.0",
 		"rimraf": "^4.4.0",
+		"source-map-explorer": "^2.5.3",
 		"source-map-loader": "^5.0.0",
 		"string-replace-loader": "^3.1.0",
 		"ts-loader": "^9.5.1",