feat: support init template from npm

[fz6m]

支持用 --template 初始化 npm 包的模板项目，以便支持 #10805 的 electron 需求。

  pnpm create umi --template electron

模板格式：

• umi-xxx-template

• @umijs/xxx-template

不精确指定会查找。

暂不支持注入数据，后续再支持。

[vercel]

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1 Ignored Deployment

Name	Status	Preview	Comments	Updated
umi	⬜️ Ignored (Inspect)	Visit Preview		Mar 23, 2023 at 2:11PM (UTC)

[codecov]

Codecov Report

Patch coverage: 24.21% and project coverage change: -0.21 ⚠️

Comparison is base (ad82b89) 29.49% compared to head (cc59711) 29.28%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #10833      +/-   ##
==========================================
- Coverage   29.49%   29.28%   -0.21%     
==========================================
  Files         464      469       +5     
  Lines       14035    14179     +144     
  Branches     3304     3336      +32     
==========================================
+ Hits         4139     4153      +14     
- Misses       9204     9319     +115     
- Partials      692      707      +15     

Impacted Files	Coverage Δ
packages/create-umi/src/template.ts	10.71% <10.71%> (ø)
packages/create-umi/src/index.ts	56.48% <43.58%> (-3.52%)	⬇️

... and 4 files with indirect coverage changes

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[xiaohuoni]

卧槽，角度清奇！