chore: add .editorconfig to all templates

[dchaudhari7177]

Closes#152. One PR covering all six templates.

Based on this repo's own file, not a generic snippet

cpa-templates already has a root .editorconfig, and it differs slightly from the one sketched in the issue (it also covers md, and adds a Makefile rule). Scaffolded projects and this repo agreeing seemed more useful than either, so each template's file follows the root one:

root = true
[*]charset = utf-8
end_of_line = lf
insert_final_newline = true
trim_trailing_whitespace = true
indent_style = space
indent_size = 4
[*.{yml,yaml,toml,md,json}]indent_size = 2

[Makefile] indent_style = tab is included only in uv-workspace-starter, the one template that actually ships a Makefile — a rule matching nothing is just noise in the other five.

Two additions worth flagging

max_line_length per template. Each file sets it for *.py from that template's own [tool.ruff] line-length: 100 everywhere except uv-workspace-starter, which is 88. Without it the editor draws its ruler at 80 while ruff reflows at 100, which is the exact confusion .editorconfig exists to prevent.

trim_trailing_whitespace = false for Markdown. Two trailing spaces are a hard line break in Markdown, so globally trimming them silently changes rendering. Every template ships 9–12 .md files, so this would have bitten.

Verified

Resolution checked with the reference editorconfig parser, not by eye — real paths in real templates:

path	property	resolved
uv-workspace-starter/app/main.py	max_line_length	88
celery-worker/worker/tasks.py	max_line_length	100
celery-worker/pyproject.toml	indent_size	2
celery-worker/README.md	trim_trailing_whitespace	false
uv-workspace-starter/Makefile	indent_style	tab
mlops-sklearn-starter/config.yaml	indent_size	2

All files are LF with a trailing newline. python scripts/ci/validate-registry.py passes: ✅ registry ok (6 templates, 18 extensions).

I also checked the declared widths against the existing code so the config isn't stating something the templates violate: every template's .py files are within their declared width, with one pre-existing exception — fastapi-starter/app/core/exception_handlers.py:60 is 107 chars, and the overflow is a trailing # type: ignore[arg-type]. max_line_length is a ruler rather than an enforcement, so nothing breaks; noting it in case you'd rather that line were wrapped.

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📥 Commits

Reviewing files that changed from the base of the PR and between 6986f9b and 7dcc953.

📒 Files selected for processing (6)

• templates/celery-worker/.editorconfig
• templates/cli-starter/.editorconfig
• templates/django-api/.editorconfig
• templates/fastapi-starter/.editorconfig
• templates/mlops-sklearn-starter/.editorconfig
• templates/uv-workspace-starter/.editorconfig

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[ulises-jeremias]

Thanks @dchaudhari7177 — closing as duplicate of #159 (same fix #153.editorconfig). #159 combines #152+#153 and avoids duplication with #154/#156/#157/#158. Thanks for the PR!