* feat(family-api): add FAMILIES const and family-taxonomy tests
Introduce `wickra_core::FAMILIES`, a `&'static [(&str, &[&str])]` mapping
every built-in indicator to one of 16 families (Moving Averages, Momentum
Oscillators, Trend & Directional, Price Oscillators, Volatility & Bands,
Bands & Channels, Trailing Stops, Volume, Price Statistics, Ehlers /
Cycle (DSP), Pivots & S/R, DeMark, Ichimoku & Charts, Candlestick
Patterns, Market Profile, Risk / Performance).
Two compile-time-anchored guards make sure the const stays trustworthy:
- `no_duplicates_across_families`: no indicator is listed in two families
- `total_count_matches_expected`: hard-coded total bumps in lockstep with
the indicator catalogue (214 today), so any new indicator added without
being filed under a family trips the test.
Also corrects the module doc comment which falsely claimed
indicators were grouped by category internally; the `mod` block is
alphabetical, and the canonical taxonomy now lives in `FAMILIES`.
* chore: sync indicator count to 214
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Co-authored-by: wickra-bot <wickra-bot@users.noreply.github.com>
