**What kind of change does this PR introduce?**
Spawn own server when running `ng e2e`. Give user option to not replace
`ng e2e`.
**Did you add tests for your changes?**
Yes.
**If relevant, did you update the documentation?**
Yes, `ng-schematics` README.md updated.
**Summary**
When running `ng-schematics`'s `ng e2e` command spawns it's own server.
This way we remove the need of developers to run `ng server` separately
thus increasing ease of use in development and CI.
We want to support Protractor migration so we give the user the option
to opt out of replacing `ng e2e` so they can have a gradual migration.
(Note: There may be issues with folder conflicts, to be address in a PR
for adding better Migration support)
**Does this PR introduce a breaking change?**
Yes, as we don't check if required options are there before spawning the
server.
**Other information**
Co-authored-by: Alex Rudenko <OrKoN@users.noreply.github.com>
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