Simplify source submission: auto-detect icons, centralize translations, add scaffolding

[markvp]

Summary

This PR significantly reduces the boilerplate required to submit new waste collection sources. 544 files changed, ~2,770 lines removed net.

A minimal new source goes from ~100 lines to ~20 lines.

Changes

• Framework-level icon auto-detection — new service/icons.py with guess_icon() that maps waste type names to MDI icons via keyword matching across 12+ languages (English, German, French, Italian, Dutch, Swedish, Polish, Czech, Norwegian, Danish, Finnish, Spanish). Icons are auto-assigned in Collection.__init__() when none is explicitly passed. Removes or reduces ICON_MAP from 521 source files.

• Expanded default_translations.py — adds ~35 missing common parameters (street, address, city, house_number, suburb, etc.) across all 4 languages (en/de/it/fr). Removes redundant PARAM_TRANSLATIONS from 77 source files where they duplicated defaults.

• Source scaffolding CLI (scripts/new_source.py) — interactive + non-interactive tool to generate new source files with correct boilerplate structure.

• Updated contributing docs (doc/contributing_source.md) reflecting that ICON_MAP and PARAM_TRANSLATIONS are no longer needed for common cases.

How icon auto-detection works

Collection.__init__() now calls guess_icon(waste_type) when no icon= is passed. The function uses keyword-in-string matching against a curated database of ~200 waste type keywords across 12+ languages:

# Before (every source needed this):
ICON_MAP = {
    "Restmüll": "mdi:trash-can",
    "Biotonne": "mdi:leaf",
    "Gelber Sack": "mdi:recycle",
    "Papier": "mdi:package-variant",
}
# ...
Collection(date=d, t=t, icon=ICON_MAP.get(t))

# After (framework handles it):
Collection(date=d, t=t)

Sources can still pass icon= explicitly to override auto-detection. Existing ICON_MAP entries that can't be auto-detected are preserved.

Related upstream PRs (mampfes/hacs_waste_collection_schedule)

• Supersedes Unify usage of Icons mampfes/hacs_waste_collection_schedule#2814 ("Unify usage of Icons" by @dala318) — our approach goes further with runtime keyword-based auto-detection rather than an enum. The keyword database was built by mining all 529 existing ICON_MAP definitions.
• Complements Clarify self-service source PR path and add examples mampfes/hacs_waste_collection_schedule#5578 ("Clarify self-service source PR path" by @bbr111) — our scaffolding CLI and simplified contributing docs serve the same goal of lowering the barrier for new contributors.
• Compatible with Generate source owner mapping from source module metadata mampfes/hacs_waste_collection_schedule#5577 ("Source owner mapping") and make update_docu_links independet on the location it is called from mampfes/hacs_waste_collection_schedule#5583 ("update_docu_links portability") — no conflicts.

Test plan

• pytest tests/test_source_components.py — 6/6 pass
• python update_docu_links.py && git diff --exit-code — clean
• Rebased onto latest upstream master (resolved 3 conflicts: ecoharmonogram_pl, lumire_se, southkesteven_gov_uk)
• Spot-check icon auto-detection on representative sources across languages
• Review keyword coverage in service/icons.py for edge cases
• Verify scaffolding CLI generates valid source files

https://claude.ai/code/session_01Q9WEShLzCkFySi98PUYumA