Fix linting errors in examples/ directory

[ambicuity]

Description

The examples/ directory currently contains numerous linting errors (~952) when checked with ruff. These include:

• Docstring formatting issues (D205, D212, D400, D415)
• Trailing periods in run commands
• Typos and grammatical errors
• Code style inconsistencies

This issue tracks the effort to clean up the examples/ directory and bring it into compliance with the project's linting standards, following the recent directory restructuring.

Tasks

• Fix formatting issues (D205 blank lines, etc.)
• Fix punctuation issues (D415)
• Fix typos and logic errors identified during review
• Ensure ruff check examples/ passes (or significantly reduces errors)

[ambicuity]

Progress Update ✅

Commit: 7dd76e5 (GPG + DCO signed)

Results:

Metric	Before	After	Change
Total Errors	952	185	-80.6%
D205 (blank lines)	183	0	Eliminated

Fixed:

• D205: All blank line issues
• Trailing periods: Removed from run commands
• Typos: trasfer→transfer, recipent→recipient, a NFT→an NFT
• Critical fix: Added freeze_with() and receipt validation to NFT transfer

Remaining (185 errors):

D103/D104 (missing docstrings) - can be addressed in follow-up PRs.

PR: #1755