LL-6794 Add ability to overrides plugins + be chainId ready

[gre]

• added a way to disable the baseURL fetching of plugin
• added a way to explicitely provide the plugins data instead of fetching it
• add test to cover the new mechanism
  • disable fully the baseURL should disable plugin
  • disable the baseURL + hardcoded plugin config should enable plugin
• update the "importer" to split per chainId too can't do this until this happens in CAL

gist

const eth = new Eth(transport);
eth.setPluginsLoadConfig({
  baseURL: null, // disable fully the data fetching
  extraPlugins: { ...some plugins... } // specify extra plugins to be added
})
eth.setPluginsLoadConfig({
  baseURL:"https://cdn.live.ledger-stg.com", // use a staging api
})

[codecov]

Codecov Report

Merging #658 (73519a8) into master (e1d07e7) will increase coverage by 0.24%.
The diff coverage is 95.23%.

❗ Current head 73519a8 differs from pull request most recent head 7606dc7. Consider uploading reports for the commit 7606dc7 to get more accurate results

@@            Coverage Diff             @@
##           master     #658      +/-   ##
==========================================
+ Coverage   42.42%   42.66%   +0.24%     
==========================================
  Files          72       72              
  Lines        4255     4268      +13     
  Branches      711      705       -6     
==========================================
+ Hits         1805     1821      +16     
+ Misses       2436     2433       -3     
  Partials       14       14              

Impacted Files	Coverage Δ
packages/hw-app-eth/src/contracts.ts	96.00% <93.33%> (+21.00%)	⬆️
packages/hw-app-eth/src/Eth.ts	85.15% <100.00%> (+0.13%)	⬆️

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[gre]

i'll rollback the idea to split per chainId because there is possibly no need to do so.

The idea i had was:

LEGACY: https://cdn.live.ledger.com/plugins/ethereum.json
NEW: https://cdn.live.ledger.com/plugins/ethereum/${chainId}.json

for now, we stay on just having all in ethereum.json

[pscott]

Late to the party but thanks for the work @gre :)