📒 Add Ledger support

[JuaniRios]

What?

• Add support for the Ledger hardware wallet

How?

• Add a new signed extension to the runtime, and conditional build of the wasm.

Testing?

@lrazovic can you try it out with zombienet since you have a ledger nano?

Anything Else?

There are 2 places where I had to initialise the signed extensions with ::new(), but not sure if the argument inside should be true or false. I set it to true

[JuaniRios]

• 📒 Add Ledger support #398 👈
• ✨ Slashing behavior for pallet vesting #396
• ✨ Vesting schedule merge runtime API #395
• ✨ Set balance to u128 instead of config type on pallet_funding #394
• 🚮 Delete funding storage migrations #393
• Unneeded TODO removal #392
• 👨🏻‍💻 Tightly couple linear-release to funding pallet #391
• 🙅🏻‍♂️ Hide instantiator behind feature flag #389 : 1 other dependent PR (#390 )
• ✍🏻 Fix docs #386 : 1 other dependent PR (#387 )
• 🔖 Runtime Upgrade #383
• 💻 Runtime Benchmarks #384
• 🙅🏻‍♂️ Disallow 0CT participation #385
• 🔧 Fix penpal #388
• main

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[JuaniRios]

Merge activity

• Sep 12, 9:39 AM EDT: @JuaniRios started a stack merge that includes this pull request via Graphite.
• Sep 12, 9:57 AM EDT: Graphite rebased this pull request as part of a merge.
• Sep 12, 9:58 AM EDT: @JuaniRios merged this pull request with Graphite.