Feature Request: Add JSDocs to each Backend Function

[ZeroSums]

Add JSDocs for each Function in /backend.

This will be a v2 addition - do NOT create a PR with this feature under the V1 branch(s)

I've already added some in V1 for a working example:

/**
 * Confirms a transaction with exponential backoff in case of rate limits or temporary network errors.
 * Retries a set number of times before throwing an error.
 *
 * @param {Rpc} connection - The RPC connection object used for interacting with Solana.
 * @param {string} signature - The transaction signature to confirm.
 * @param {number} [maxRetries=10] - The maximum number of retries.
 * @returns {Promise<void>} - Resolves when the transaction is confirmed or throws if retries are exhausted.
 * @throws {Error} If the transaction cannot be confirmed after maximum retries.
 */
async function confirmTransactionWithBackoff(
    connection: Rpc,
    signature: string,
    maxRetries: number = 10
): Promise<void> {
  let retries = 0;
  let delay = 2000; // Start with 2 seconds
  while (retries < maxRetries) {
    try {
      const result = await connection.confirmTransaction(signature);
      if (result && result.value && result.value.err === null) {
        return; // Transaction confirmed successfully
      }
    } catch (error: any) {
      if (error.code !== -32601 && error.code !== 429) {
        throw error; // Re-throw unexpected errors
      }
      console.log(`Rate limit hit or method not found, retrying in ${delay / 1000} seconds...`);
    }
    await new Promise(resolve => setTimeout(resolve, delay));
    delay *= 2; // Exponential backoff
    retries++;
  }
  throw new Error("Transaction confirmation failed after maximum retries.");
}