feat(dev-infra): create tool to determine conflicts created by a PR (#37051)

Creates a tool in ng-dev to determine the PRs which become conflicted
by merging a specified PR.  Often the question is brought up of how
many PRs require a rebase as a result of a change.  This script allows
to determine this impact.

PR Close #37051

dev-infra/tmpl-package.json

@@ -9,6 +9,7 @@
     "ts-circular-deps": "./ts-circular-dependencies/index.js"
   },
   "dependencies": {
+    "@octokit/graphql": "<from-root>",
     "chalk": "<from-root>",
     "cli-progress": "<from-root>",
     "glob": "<from-root>",
@@ -16,6 +17,7 @@
     "minimatch": "<from-root>",
     "multimatch": "<from-root>",
     "shelljs": "<from-root>",
+    "typed-graphqlify": "<from-root>",
     "yaml": "<from-root>",
     "yargs": "<from-root>"
   },