feta: add hosts support domain and mulitple ip (#439)

* feat: host support domain and multiple ips

* chore: append local address via `clash`

* chore: update hosts demo

* chore: unified parse mixed string and array

* fix: flatten cname

* chore: adjust logic

* chore: reuse code

* chore: use cname in tunnel

* chore: try use domain mapping when normal dns

* chore: format code

docs/config.yaml

@@ -58,6 +58,9 @@ hosts:
 # '*.clash.dev': 127.0.0.1
 # '.dev': 127.0.0.1
 # 'alpha.clash.dev': '::1'
+# test.com: [1.1.1.1, 2.2.2.2]
+# clash.lan: clash # clash 为特别字段，将加入本地所有网卡的地址
+# baidu.com: google.com # 只允许配置一个别名
 
 profile: # 存储 select 选择记录
   store-selected: false