ngx-leaflet Restructure Frontend

[Yicong-Huang]

Restructure frontend with ngx-leaflet

• core-map

• time-bar

• side-bar

• time-service

• tweet-service

• map-service

• fire-tweet-layer

• wind-layer

• fire-polygon-layer

[Yicong-Huang]

@XinyueHan7 @AC-Unicorn please use this issue to keep track of New-GUI's progress. Thanks