Add encoded LNURL support

[KKA11010]

• Renamed isLnurl to isLnurlAddress

[x] Added lib nbd-wtf/js-lnurl
[x] Added bech32-encoded lnurl utils file
[x] Detect encoded lnurl in QR code
[ ] Detect lnurl in input field
[ ] Handle decoded lnurl
[ ] Update UI

Fixes #248

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 6.25000% with 15 lines in your changes are missing coverage. Please review.

Project coverage is 13.14%. Comparing base (5fc6562) to head (4214a59).

Files	Patch %	Lines
src/util/lnurl.ts	0.00%	8 Missing ⚠️
src/screens/Payment/Send/Inputfield.tsx	0.00%	2 Missing ⚠️
src/screens/QRScan/index.tsx	0.00%	2 Missing ⚠️
src/screens/Payment/Processing.tsx	0.00%	1 Missing ⚠️
src/screens/Payment/Send/CoinSelection.tsx	0.00%	1 Missing ⚠️
src/util/index.ts	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #310      +/-   ##
==========================================
- Coverage   13.16%   13.14%   -0.03%     
==========================================
  Files         167      168       +1     
  Lines        6214     6224      +10     
  Branches     1702     1704       +2     
==========================================
  Hits          818      818              
- Misses       5249     5259      +10     
  Partials      147      147              

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