Stellar | Donation service changes

[MoeNick]

• [x] on get Tokenlist we don't have any changes. We put Lumens
• [x] We should add stellar Lumens token to our main token DB.
• [x] When user put the amount and click on next, we create a pending trn and start a job for detecting the transaction based on the technical architecture doc. https://docs.google.com/document/d/1S2ow_uQrSIIYU4WMRKoQkIo7ZVuCbYM8yOyxDYck9As/edit

• [x] Pending trn with manual tokens like Stellar, should have a validity date (timer) when we can't detect in-time, we make the donation failed.

[MoeNick]

kindly pls check all remained items