fix: avoid potential race-condition in fuel connectors init

[maschad]

• Closes Connector may arbitrary change on component re-render if several wallets are installed #2892

Release notes

In this release, we:

• Fixed a potential race condition where the fuel connector may disconnect upon re-render
• Introduced an init method for synchronous instantiation of a fuel-connectors object

Summary

• Ensure the promise when setting up the default connector is always awaited
• Builds on @svvald 's work in fix: flakey connectors on re render #2943

Checklist

• All changes are covered by tests (or not applicable)
• All changes are documented (or not applicable)
• I reviewed the entire PR myself (preferably, on GH UI)
• I described all Breaking Changes (or there's none)

[github-actions]

This PR is published in NPM with version 0.0.0-pr-2930-20240816221357

[Torres-ssf]

@LuizAsFight @helciofranco do the changes made here represent any breaking change into the useFuel React hook?

[github-actions]

Coverage Report:

Lines	Branches	Functions	Statements
79.41%(-0.01%)	71.82%(+0.03%)	77.7%(-0.14%)	79.54%(-0.01%)

Changed Files:

Ok	File (✨=New File)	Lines	Branches	Functions	Statements
🔴	packages/account/src/connectors/fuel.ts	95.39% (-1.16%)	90.66% (+1.33%)	88.88% (-6.35%)	95.56% (-1.12%)