Add more graceful error handling for common pathways

[tuxxy]

For example, when trying to sign without registering, you get a big blob:

/Users/tux/code/cli/node_modules/@entropyxyz/sdk/dist/index.cjs:12218
    throw new Error(
          ^
Error: request failed 500, Internal Server Error fetch: http://3.84.209.123:3001/user/sign_tx FULLRESPONSE: Chain Fetch: Not Registering error: Register Onchain first
    at sendHttpPost (/Users/tux/code/cli/node_modules/@entropyxyz/sdk/dist/index.cjs:12218:11)
    at processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async /Users/tux/code/cli/node_modules/@entropyxyz/sdk/dist/index.cjs:12769:26
    at async Promise.all (index 1)
    at async SignatureRequestManager.sign (/Users/tux/code/cli/node_modules/@entropyxyz/sdk/dist/index.cjs:12670:18)
    at async SignatureRequestManager.signWithAdaptersInOrder (/Users/tux/code/cli/node_modules/@entropyxyz/sdk/dist/index.cjs:12636:23)
    at async Entropy.signWithAdaptersInOrder (/Users/tux/code/cli/node_modules/@entropyxyz/sdk/dist/index.cjs:13186:12)
    at async Object.sign (/Users/tux/code/cli/src/flows/sign/index.ts:91:24)
    at async main (/Users/tux/code/cli/src/index.ts:89:30)
error Command failed with exit code 1.

We should identify these common UX errors and give more graceful error messages for them rather than erroring all ugly.

[mixmix]

Here's a map of the ones I've found / we need to test:

• Graceful Errors - unregistered sign #295
• Graceful Errors - bad transfer #296
• Graceful Errors - deploy #297
• Graceful Errors - program add #300
• Graceful Errors - program remove #299

Ones that look fine to me

• entropy account create
• entropy account import
• entropy account register
• entropy balance

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closing this issue as we have spawned child issues tracking work needed