refactor: Remove typed-rpc dependency and used fetch instead

[SeDemal]

Fetch method POST achieves basically the same as typed-rpc.
Could actually use all that was already made and just swap it.
Allows to remove a dependency.

Closes #1104
To delete once merged

[deepsource-io]

Here's the code health analysis summary for commits aca5c27..4d31002. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
JavaScript	✅ Success		View Check ↗

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[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	39.65%	13257 / 33432
🔵	Statements	39.65%	13257 / 33432
🔵	Functions	36.54%	360 / 985
🔵	Branches	71.66%	1209 / 1687

File Coverage

File	Stmts	% Branch	% Funcs	% Lines	Uncovered Lines
Changed Files
packages/integrations/src/download-client/nzbget/nzbget-integration.ts	75.2%	78.26%	70%	75.2%	45-57, 68-69, 76-77, 85, 110-111, 120, 127-135
packages/integrations/test/nzbget.spec.ts	98.42%	95.65%	100%	98.42%	194-195
packages/widgets/src/downloads/component.tsx	0%	0%	0%	0%	1, 3, 5, 23-24, 35-36, 38, 40-42, 44, 50, 53, 56-74, 76-79, 81-84, 86, 88-97, 99, 105-108, 111-120, 123-124, 127-128, 131-133, 136-141, 143, 145-148, 150-151, 153-154, 156-157, 159-160, 162-166, 169-171, 173, 175-178, 180, 182-189, 191-199, 201-209, 211-220, 222-224, 227-234, 236-269, 272-274, 277-295, 298-301, 304-306, 309-320, 323-327, 331-353, 356-364, 366-371, 373, 375-389, 391-399, 401-408, 410-412, 414-433, 436-454, 456-472, 474-483, 485-505, 507-571, 574-603, 605-635, 637, 640-650, 652-654, 656-660, 664-674, 676-680, 682-685, 687, 696-701, 703-706, 708-740, 742, 744, 746-749, 752-766, 768-774, 776, 778, 780, 787-821, 823-825, 827-834, 836-845, 847-849, 851-884, 886-888, 890-906, 908-910, 912-914, 916-921, 923

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