Lookup from files and add missing localization item

[gdlcf88]

Lookup missing localization items from all the .cs/.cshtml/.js files and add them to the localization files.

Maybe these keywords can be used:

• L('*')
• l('*')
• L("*")
• l("*")
• .L('*')
• .l('*')
• .L("*")
• .l("*")
• L['*']
• l['*']
• L["*"]
• l["*"]
• .L['*']
• .l['*']
• .L["*"]
• .l["*"]

[wakuflair]

It's not practical to detetmine the method name, maybe developers inject a localizer and use _localizer["…"] form. Any other form is also possibile.