feat: telegram mini-app

[TaToTanWeb]

Adds a simple Web App for users to access different UNICT Devs projects. A working example can be found here: https://t.me/DMIBotTestBot
Steps for building:

cd webapp
npm install
npx parcel build index.html

Note: the parts of the code related to the Google Drive API in module/commands/gdrive.py have been separated from the ones related to the telegram API and moved to module/utils/drive_utils.py in order to make them accessible from the mini-app.

[Helias]

awesome 🚀

Showing the OPIS Manager there is not a bad idea, in this way someone will use it xD

About showing Ask DMI and Spotted DMI, thinking about it we should show them in the main buttons of the DMI Bot too

[Helias]

never use var, use always const or let

Suggested change

	for (var i=0; i < content.length; i++)
	for (let i=0; i < content.length; i++)

[TaToTanWeb]

i am quite sure i need var in this case because the variable i is also used later (outside the for loop), and using "let" would cause it to be out of scope

[Helias]

then, create the variable using let before the for cycle

let i;
for (i = 0; i < content.length; i++)

[Helias]

I would ask community members to see if we could add more things here or make changes

[TaToTanWeb]

Thank you very much for the review! I applied your suggestions and tried to fix pylint errors – some of these were not related to code I have changed, I tried to fix them but I didn't know the context, I hope I didn't break anything