The dev-infra build tooling is now decoupled from `ng-dev`. This will
make it easier to update `ng-dev` without necessarily needing to upgrade
the whole build system, Bazel etc. This is useful when e.g. new release
tool features have been added and should also be ported to active LTS
branches.
The `ng-dev` tool is now strict ESM. Config loading needs to be updated
to also emit `.mjs` with `ts-node` (this cannot happen dynamically as
ESM Node loading cannot be patched by ts-node at runtime).
All TypeScript files have been updated to pass the new eslint-based linting checks. eslint compatible disabling comments have also been added in place of the previous tslint comments.
Added types from the commit validation script to CONTRIBUTING. Added
packages names from the package script to the scope section. Added
examples of good commit messages.
Also corrected some texts.
