Fix editorconfig check for files that don't contain python code

[kingbuzzman]

Fixes small issue caused by #1225

tox.ini is not inside of paths: pytest_django, pytest_django_test, tests -- so it was never checked, as well as all the other files in the root and .github.. anyway, this is more correct.

[Copilot]

Pull Request Overview

This PR fixes the editorconfig checker configuration to properly validate all project files, not just Python source directories. The issue was that the ec command was only checking specific Python source paths, missing configuration files in the project root and .github directory.

• Updated the editorconfig checker to scan the entire project directory (.) instead of just Python source directories
• Added exclusions for build artifacts and cache directories to prevent false positives

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
tox.ini	Changed editorconfig checker command to scan entire project directory
.editorconfig-checker.json	Added exclusions for build artifacts and cache directories

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[kingbuzzman]

PS. the time difference between . and pytest_django pytest_django_test tests is completely indistinguishable

New run 15s
Old run 14s

Yet they both took 38s to finish. -- completely negligible