feat(client): add tests/ gift card API/ multiple fixes (#1470)

* first commit

* ruff check fix

* ruff format fix

* fix lint warnings and error

* type fix for 3.7

* add testnet to test_Ws_api

* change to testnet

* ruff@

* return test to async in test

* format with ruff

* remove blank line

* remove default tif

* add ws_futures, refactor and add tests

* lint

* fix tests

* ruff

* add tests

* remove utils

* ruff format and pr comments

* ruff format

* fix live tests and add env vars for testnet

* merge

* github action

* add tox env

* fix and test without tox

* move tox command

* fix test

* fix pyright

* type ignore

* jump test

* jump test until whitelist

* in progress

* finish tests

* remove print

* add examples

* improve docs

* fix batch order

* lint and format

* lint and format

* add tests for failed requests

* fix for 3.7

* Add gift cards endpoints and tests'

* run tests in parallel

* run tests in parallel

* reduce parallelism

* run github action sequentially

* change to 2 parallel

* fix action

* ruff format

* delete empty file

* skip dust assets test

* add missing force params

* add rerun to reduce flakiness

* remove change

* distribute tests over file

* fix test

* remove parallel test running

* increase delay

* update readme

* improve get_asset_balance

* add tests

* reformat

* tmp: continue on error

* fix cancel test

* ruff format

* update headers

* inject headers

* add overridable headers

* add headers tests

* format

* remove import

* fix tests linting

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Co-authored-by: carlosmiei <43336371+carlosmiei@users.noreply.github.com>