feat: 支持运行时配置嵌套的路由关联微应用

[kuitos]

比如运行时路由配置的是：

routes: [
  { path: '/app1', microApp: 'app1' },
+ { path: '/app2', routes: [
+   { path: '/app2/nest', microApp: 'app2' }
+ ] },
]

[codecov]

Codecov Report

Merging #706 (942f829) into master (a52a776) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #706   +/-   ##
=======================================
  Coverage   52.05%   52.05%           
=======================================
  Files          64       64           
  Lines        1579     1579           
  Branches      425      425           
=======================================
  Hits          822      822           
  Misses        748      748           
  Partials        9        9           

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[ttys026]

LGTM