refactor: restructure code with better code tree (#4)

* refactor: rename capturer/index.js

* refactor: rename ui/Panel.*

* refactor: rename MessagesView to RpcView

* refactor: restructure almost all files in src/ui

* refactor: add a blank line between imports lines

* fix: endOfLine "lf" will conflict with CCA release commit

Author: tyn1998

.prettierrc

@@ -3,6 +3,5 @@
   "singleQuote": true,
   "trailingComma": "all",
   "printWidth": 120,
-  "proseWrap": "never",
-  "endOfLine": "lf"
+  "proseWrap": "never"
 }

package.json

@@ -68,4 +68,4 @@
     "webpack-cli": "^4.9.2",
     "webpack-dev-server": "^4.3.1"
   }
-}
+}