[erp5_officejs] "Javascript Editor" is now a progressive webapp
Add manifests to make the app a progressive webapp. There are 2 manifests : one during the installation process (while the app is loading) and one for the app itself. Note that the "start_url" parameter is made for the officejs app URL ([your_app].app.officejs.com/[release_number]). It doesn't work on an ERP5 instance ([instance_url]/erp5/web_site_module/[your_app]). If you want to make it work on the ERP5 instance for testing purposes, remove one "../". Update the Javascript Editor logo according to Vincent's wishes.
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![bt5/erp5_officejs/PathTemplateItem/image_module/gadget_officejs_appstore_app_text_editor_icon_javascript_editor_png.png](https://lab.nexedi.cn/xiaowu.zhang/erp5/-/raw/f3b71a46b58ef69813c02bdbe4aa3a858bf70aec/bt5/erp5_officejs/PathTemplateItem/image_module/gadget_officejs_appstore_app_text_editor_icon_javascript_editor_png.png)