Build Capital Quest for CoCo 3 with maps and emulator tests

data/SOURCES.md

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+# State/capital verification
+
+`states.tsv` is the canonical 50-row alphabetical dataset. Postal code, full
+state name, and capital travel together into `src/states.c`. Geography span
+index N is always TSV row N; no second alphabetical ordering is introduced.
+Alaska = Juneau; Hawaii = Honolulu. DC and territories are excluded.
+
+Checked 2026-11-09 against both full lists:
+
+- <https://www.50states.com/tools/thelist.htm>
+- <https://factsinstitute.com/countries/state-capitals/>
+
+Minnesota is displayed as **Saint Paul**. Normalization also accepts **St. Paul**
+and **St Paul**, in any case and with repeated or surrounding whitespace.
+
+`map-seeds.json` documents source SVG interior coordinates, replacing outside
+callout-label positions for small Northeast states. The conversion asserts
+that each seed is land and is in a distinct connected state region. Detached
+land is assigned to its nearest identified region, with explicit geographic rules for the
+Alaska/Hawaii inset islands and Michigan's Upper Peninsula. Geometry is a simplified educational
+map, not a survey or political boundary authority.
+
+`map-manifest.json` records source region sizes, per-view dimensions, source
+crop bounds and per-state pixel coverage. `tests/check_assets.py` checks all
+50 identity slots, disjoint span coverage, bounds, and small-state/inset
+presence. `tools/prepare_assets.py` reproduces all generated C and previews
+using only Python's standard library; no SVG is parsed by the CoCo program.