feat(pg-core): add native daterange column type

[alexbaileyuk]

Summary

Adds first-class support for the PostgreSQL daterange column type, partially addressing #2700.

• New daterange() column builder with two modes:
  • Object mode (default): parses to PgRange<string> with typed lower/upper bounds, inclusivity flags, and empty range detection
  • String mode: raw PostgreSQL text passthrough
• Shared range infrastructure (PgRange<T>, parseRange, serializeRange) in range.common.ts, designed for reuse when adding the remaining range/multirange types (int4range, int8range, numrange, tsrange, tstzrange, and their multirange counterparts)
• drizzle-kit introspection support so daterange columns are correctly recognized during pull

Usage

import { pgTable, serial, daterange } from 'drizzle-orm/pg-core';
import type { PgRange } from 'drizzle-orm/pg-core';

const events = pgTable('events', {
  id: serial('id').primaryKey(),
  period: daterange('period').notNull(),
  periodRaw: daterange('period_raw', { mode: 'string' }),
});

// Insert
const range: PgRange<string> = {
  lower: '2025-01-01',
  upper: '2025-12-31',
  lowerInc: true,
  upperInc: false,
  empty: false,
};
await db.insert(events).values({ period: range });

Test plan

• All 6 new integration tests pass (normal ranges, string mode, empty ranges, unbounded ranges, nullable columns, raw SQL)
• All 13 existing drizzle-kit pg-columns tests pass (no regressions)
• drizzle-orm type-checks cleanly
• Verify drizzle-kit push + pull round-trip with a live PG database

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