feat: transaction history exporter

[fmorency]

• Track source network of every transaction, improving efficiency when multiple backends are used
• Export history to a CSV file with the following fields
  • id: encoded transaction ID
  • date: transaction (local) date
  • time: transaction (local) time
  • type: transaction type
  • from: funds were taken from this account
  • to: funds were moved to this account
  • amount: the amount transfered
  • symbol: the token symbol used for the transaction
• send, mint and burn are supported, including transactions executed via multisig

Fixes #143

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[codecov[bot]]

Codecov Report

Attention: 43 lines in your changes are missing coverage. Please review.

Comparison is base (e9f0eb5) 34.27% compared to head (9c4c9c2) 35.10%.

Files	Patch %	Lines
...ions/components/txn-list/txn-export/txn-export.tsx	18.86%	43 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #146 +/- ## ========================================== + Coverage 34.27% 35.10% +0.82% ========================================== Files 89 90 +1 Lines 2340 2396 +56 Branches 665 683 +18 ========================================== + Hits 802 841 +39 - Misses 1527 1544 +17 Partials 11 11 ```

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[fmorency]

I'm not sure about the UI side of things but this PR should get the ball rolling. Happy to get your feedback.