feat: add example for interacting with contract

[leszek-vechain]

Description

Added example with contract interaction to our docs

Fixes # (#1550 )

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• manually tested on thor solo docker node

Checklist:

• My code follows the coding standards of this project
• I have performed a self-review of my code
• I have commented on my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• New and existing integration tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have not added any vulnerable dependencies to my code

[github-actions]

Test Coverage

Summary

Lines	Statements	Branches	Functions
	99% (4368/4412)	97.56% (1400/1435)	99.01% (906/915)

Title	Tests	Skipped	Failures	Errors	Time
core	836	0 💤	0 ❌	0 🔥	2m 20s ⏱️
network	727	0 💤	0 ❌	0 🔥	4m 51s ⏱️
errors	42	0 💤	0 ❌	0 🔥	16.703s ⏱️
logging	3	0 💤	0 ❌	0 🔥	18.356s ⏱️
hardhat-plugin	19	0 💤	0 ❌	0 🔥	1m 3s ⏱️
aws-kms-adapter	23	0 💤	0 ❌	0 🔥	1m 12s ⏱️
ethers-adapter	5	0 💤	0 ❌	0 🔥	1m 10s ⏱️
rpc-proxy	37	0 💤	0 ❌	0 🔥	1m 3s ⏱️