Add wallet management via ui

[deverickapollo]

No description provided.

[Kukks]

Just wanted to say I love how dedicated you guys are with this development!

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +8.04% (target: -1.00%)	✅ 73.75%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (d61513b)	993	581	58.51%
Head commit (9807a32)	1366 (+373)	909 (+328)	66.54% (+8.04%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#58)	499	368	73.75%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[napoly]

This PR should link the wallet with the generated invoice as we might end up in a mess.. this info might be beneficial for user as well as for the system itself. I also don't think this PR should be merged before #61 is resolved as anyone using a previously used wallet for invoice generation would get duplicate key constraint violation.

[napoly]

There’s a lot of good stuff in here.

I’m finding it really difficult to properly review 2k+ lines in one go, and I’m worried I won’t be able to give it the attention it deserves.

Would it be possible to split this into smaller, atomic PRs (wallet state, migration..) ?