Fix spelling typos in docs, source, and tests (#2134)

[mr-raj12]

Summary

Spelling typos found using codespell and fixed manually across 16 files (24 corrections).

Scope

• Docs: CHANGELOG.rst, installation.rst, reference_importer_overview.rst, reference_improver_overview.rst, tutorial_add_importer_pipeline.rst,
  tutorial_add_improver_pipeline.rst
• Source: federated/README.rst, federated/__init__.py, import_runner.py, improve_runner.py, models.py, pipelines/nvd_importer.py,
  pipelines/v2_importers/nvd_importer.py, utils.py, views.py
• Tests: test_nginx_importer_pipeline.py

All changes are limited to comments, docstrings, documentation, and one local test variable rename. No functional code changes.

Full list of corrections: #2134

Fixes #2134

Signed-off-by: Mrityunjay Raj mr.raj.earth@gmail.com

[mr-raj12]

Hi @pombredanne,

This PR fixes 24 spelling typos across 16 files (docs, source, and tests) — found
using codespell and corrected manually. No functional code changes, except one
local test variable rename (reponse_files → response_files).

Details of all corrections are in #2134.

Would appreciate your review when you get a chance. Thank you!

[mr-raj12]

@pombredanne — a couple of related observations while exploring on the repo:

1. Missing issue templates: VulnerableCode currently has no issue templates
   (unlike scancode-toolkit which has bug report, feature request, etc.). Would it
   be useful to add .github/ISSUE_TEMPLATE/ templates here as well? I'd be happy
   to work on that if you'd like.

2. Automated spell checking: I've been running codespell manually across several
   aboutcode-org repos (scancode.io, scancode-toolkit, vulnerablecode). It might be
   worth adding a GitHub Actions workflow to run codespell as a CI check — this would
   catch typos early in PRs before they're merged. Something like:

   - uses: codespell-project/actions-codespell@v2
     with:
       skip: "*.json,*.yaml,*.LICENSE"
       ignore_words_list: "..."
   
   I could put together a PR for this if there's interest, potentially as a shared
   workflow across the aboutcode-org repos.