fix: Move tx signing logic to the substrate transaction queue

[shekohex]

Summary of changes

• Add Typed Erased Static Transaction payload so we can serialize it without limitations.
• Move the signing logic to the substrate tx queue, so that we do not need to sign anything outside the queue or manage the nonce.
• Make substrate chain id generic (to allow the method to accept any type that could be converted to a chain id)
• Improve the logging for better debugging.
• Added a test that could be run locally to test the tx queue.

Reference issue to close (if applicable)

• Closes #524

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Code Checklist

• [x] Tested
• [x] Documented

[shekohex]

@salman01zp any idea why this test keeps failing? It does pass locally.

[shekohex]

Looks like the Node just hangs after 30 blocks, does not make any progress. Running the latest Tangle from the main branch.

I did disable/skip this test for now, until we figure out why the node itself hangs.