BREAKING CHANGE:

`generateKeypair` has been removed.

* feat: Generic `decode` also decodes unsigned

* dpcs

* Don't expose decode*

* decode doesn't decode signingPayload

BREAKING CHANGE:

- `decodeTx` has been renamed to `decodeSignedTx` for clarity

* fix: Fix keepAlive

* feat: Add decodeUnsignedTx

* Generate docs

* Export new functions

* feat: Add balances::transfer_keep_alive

* Fix logic

* Use Kusama everywhere

* Refactor: No metadataRpc in createSignedTx

* Configurable era

* Regenerate docs

* Fix test

* chore: Add actions

* Correct folder