issue/issues-and-typos: Add Error Handling and npm Initialization to Documentation Example in web3.js examples

[amschel99]

Describe the issues and typos:
In the existing documentation examples, error handling was missing, and npm packages were being installed without initializing a package.json file. This could potentially lead to confusion and errors for users following the examples.

Expected behavior:
I expected the documentation examples to include proper error handling using try-catch blocks and to initialize a package.json file before installing npm packages.

Screenshots:
N/A

Additional context:
Adding error handling and initializing npm ensures that the examples provided in the documentation are more robust and reliable. This improves the overall user experience and reduces potential confusion or errors when users try to replicate the examples.