fix: correct spelling mistakes found by CodeSpell

[abhi-14gyan]

Summary

Several spelling mistakes were found across the codebase using CodeSpell. These are all in comments, docstrings, and documentation — no logic changes required.

Spelling Mistakes

File	Line	Typo	Fix
library/README.md	181	informations	information
library/src/iqb/calculator.py	85	interation	iteration
library/src/iqb/cli/cache_status.py	35	modifed	modified
library/src/iqb/cli/cache_status.py	35	on dish	on disk
library/src/iqb/pipeline/init.py	98	pipline	pipeline
library/src/iqb/pipeline/pipeline.py	117	synching	syncing

How it was found

codespell --skip=".git,*.pyc,__pycache__,.mypy_cache,.ruff_cache,*.egg-info,uv.lock,*.geojson,*.csv" .

Note

CodeSpell also flags THA in prototype/pages/IQB_Map.py:102 — this is a false positive (Thailand's ISO 3166-1 alpha-3 country code) and should be ignored.

Acceptance Criteria

• All 6 typos listed above are corrected
• ruff check . passes
• uv run pytest has no new failures
• Re-running CodeSpell shows only the THA false positive

[bassosimone]

Thanks!