feat: add station contributor commands

[clampr]

Summary

• Adds contributor commands under meteo station for maintaining the weather-stations directory: add, edit, delete, validate, duplicates, build. meteo station [ID] still does station lookups.
• The station schema is loaded only from https://raw.githubusercontent.com/meteostat/weather-stations/refs/heads/main/schema.json (fetched once per run). This repo has no local copy, and the CLI doesn't read one from the stations checkout.
• New contrib extra (jsonschema, pycountry), a providers extra (metar, lxml), and a stations_repo config key.
• parse_datetime now makes date-only end values run to 23:59:59.
• Bumps the version to 0.4.0 and meteostat to >=2.1.5.

Notes

• validate, edit, add and build need network access to fetch the schema, and so do the contrib tests.

Test plan

• uv run pytest tests/test_contrib.py (56 passed)
• uv run ruff check meteo tests

🤖 Generated with Claude Code

[Copilot]

Copilot review overview

🔵 Needs a closer look

It introduces custom Click group routing relying on framework internals and changes parse_datetime behavior for all time-series commands, so human review is warranted despite comprehensive tests.

Review effort: Balanced
Findings: 1

Open (1)

• Handle missing duplicate distance before printing · New

What changed in this PR

This PR adds a suite of contributor commands under meteo station (add, edit, delete, validate, duplicates, build) for maintaining the upstream weather-stations directory, while preserving the existing meteo station [ID] lookup. Routing is achieved with a custom Typer/Click group (StationGroup/LookupCommand) that dispatches to a hidden lookup command unless the first argument names a subcommand. Supporting logic lives in a new meteo/contrib/ package (repo access, schema validation, duplicate detection, SQLite build), and the schema is fetched once per run from the upstream repo. The PR also bumps the version to 0.4.0, adds contrib/providers extras and a stations_repo config key, and makes date-only end values span the full day in parse_datetime.

Changes:

• New contributor command group + meteo/contrib/ helpers (validation, duplicates, SQLite build, repo access) with extensive tests.
• parse_datetime(..., is_end=True) now returns end-of-day (time.max) for date-only inputs; stations_repo config key added (with coerce_value handling None defaults as str).
• Version bump to 0.4.0, meteostat>=2.1.5, and new contrib/providers optional extras (plus lockfile updates).

File	Description
meteo/​cli.py	Registers the station subcommands and aliases station/s to the new group.
meteo/​commands/​station.py	Adds StationGroup/LookupCommand routing and extracts print_metadata.
meteo/​commands/​contrib/​*.py	New add/edit/delete/validate/duplicates/build commands and shared helpers.
meteo/​contrib/​*.py	Repo access, schema validation/fixing, duplicate detection, SQLite database build.
meteo/​config.py	Adds stations_repo key; coerces None-default keys as strings.
meteo/​utils.py	parse_datetime end dates now run to end-of-day.
meteo/​__init__.py /​ pyproject.toml /​ uv.lock	Version bump to 0.4.0 and new contrib/providers extras.
README.md	Documents the new extras and local development setup.
tests/​*	Adds test_contrib.py, extends test_utils.py, and threads input through the invoke fixture.

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