@trezor/connect documentation and examples

[mroz22]

Trezor-in-monorepo #5212 introduced new documentation and examples. Only some parts of it had been fully updated at the time of merge.

@trezor/connect-examples

• agree on folder structure? Incorporate into monorepo structure or not?
• node example works
• electron renderer with asset works (dev, and build)
• electron renderer with popup works (dev and build)
• electron main process works (dev and build)
• webextension - update docs, don't forget about trezor-usb-permissions from @trezor/connect-web/webextension
• browser example

@trezor/connect/docs

• folder structure for docs? maybe move to root docs?
• update

old connect

• write up some notes on maintanance and deprecation strategy

3rd party comunication