Rp2

* added an extra check in IntraTransaction constructor: if spot_price == 0 and fee > 0 then raise an error (because the fiat value of the fee cannot be computed)
* minor edits to documentation

* in the tax_report_us output the following tabs had the description field mistakenly hidden: Airdrops, Income, Interest, Mining, Staking, Wages. All other tabs didn't have the problem. The hidden field is now visible
* the unique_id field (containing hash or exchange-specific id) is now generated in the output files (both tax_report_us and rp2_full_report)

* added Income sheet to plugin ODS template (needed by tax_report_us generator to support the new Income InTransaction type)

* added support for Income-type InTransaction (to capture misc income like Coinbase Earn)
* renamed old unique_id field to internal_id and added a new unique_id field to all transactions, which captures hash for IntraTransactions and exchange-specific unique ids for In/OutTransactions
* updated documentation to reflect latest changes
* minor fixes and refactoring

* Add py.typed to rp2 package to indicate type hint support.

* Added support for multiple logger names (e.g. plugins can use different logger names than core RP2 code).