feat(bindings): temporal time-position predicates (before, after, overbefore, overafter)

[estebanzimanyi]

Summary

Adds 96 ScalarFunction registrations for temporal time-position predicates as named functions. DuckDB's parser does not accept # as an operator-name character, so the upstream MobilityDB operators <<#, #>>, &<#, #&> cannot be reached from SQL — the named forms before / after / overbefore / overafter provide equivalent behaviour.

Surface	Count	MEOS
temporal × temporal	64 (4 ops × 4×4 type pairs)	before/after/overbefore/overafter_temporal_temporal
temporal × tstzspan	16 (4 ops × 4 temporal × 1 span)	before/after/overbefore/overafter_temporal_tstzspan
tstzspan × temporal	16 (4 ops × 4 reverse direction)	reverse-order via inverse op

Backed by 12 wrapper functions reusing TempTempBoolPred / TempSpanBoolPred / SpanTempBoolPred from PR #32.

For reverse direction, MEOS only exposes the temporal-span variant; the reverse calls swap arg order and use the inverse op (span before temporal → after_temporal_tstzspan(t, s), etc.).

Smoke test

SELECT before(tint '[1@01-01, 2@01-02]', tint '[3@01-05, 4@01-06]');     -- true
SELECT after (tint '[3@01-05, 4@01-06]', tint '[1@01-01, 2@01-02]');     -- true
SELECT overbefore(tint '[1@01-01, 2@01-02]', tint '[2@01-02, 3@01-03]'); -- true
SELECT before(tint '[1@01-01, 5@01-05]', tstzspan '[01-08, 01-10]');     -- true
SELECT after (tstzspan '[01-01, 01-03]', tint '[5@01-05, 6@01-06]');     -- false

Test plan

• make release then TZ=UTC ./build/release/test/unittest "<proj>/test/*" — full suite passes.
• After merge, PR test(parity): batch 3 — time_ops / temporal_box / temporal_topops / temporal_waggfuncs #25's 034_temporal_posops.test skip block partially unwraps for the time-position subset. The spatial-side << / >> / &< / &> (parseable by DuckDB) and value-temporal direction stay separate follow-ups.

Dependencies

Stacked on PR #32 (temporal topological predicates). Merge order: #27 → #29 → #30 → #31 → #32 → this.

[estebanzimanyi]

Consolidated into #42 (temporal time-domain predicates — topo + position combined).