feat(server-renderer): compile templates on-the-fly

[dsseng]

I've got some questions about this:

1. Should compiler be removable (server-renderer built w/o compiler, just as in Vue client renderer)?
2. Should I rewrite existing SSR tests with templates to simplify them (except, of course, render/ssrRender ones)?

[yyx990803]

Should compiler be removable (server-renderer built w/o compiler, just as in Vue client renderer)?

I don't think so since there are no size concerns for npm packages.

Should I rewrite existing SSR tests with templates to simplify them (except, of course, render/ssrRender ones)?

This is unnecessary - certain parts of the tests should be decoupled from the compiler.