feat(grpc): add missing functions

[Darkness4]

To match with the Go CLI client:

• Updated viem
• Added methods to manage allowance (getAllowance, watchApproval, watchAllowance)
• Added methods to manage balance (getBalance, transferCredits, watchTransfer, watchBalance)

• Added lazy iterator getJobs:

  async *getJobs(walletAddress?: Hex): AsyncIterable<JobSummary> {
  const jobIds = await this.listJob(walletAddress);
  
  for (const jobId of jobIds) {
    yield await this.getJob(jobId);
  }
  }

• Added waitForTransactionReceipt to avoid race conditions on some sensitive functions
• Added watchNewJobRequest and watchJobTransition
• Added examples about managing allowance and credits.
• Update hello-world example and replace polling statuses with watchTransition.
• Added and exported FormatJobStatus(s: number): string

What's missing compared to Go:

• manage providers

Possible bugs:

• When using a WS functions, it seems there is a dangling promise. Looks like on viem-side though.