feat(bindings): valueSplit / timeSplit / valueTimeSplit TableFunctions

[estebanzimanyi]

Closes the TableFunction-deferred portion of `temporal/025_temporal_tile`. Set-returning splitters that bucket a temporal into one row per (value[, time]) bin.

New SQL surface (16 TableFunction overloads)

Signature	Returns
`valueSplit(tint, integer[, integer])`	`TABLE(value bigint, tint tint)`
`valueSplit(tfloat, double[, double])`	`TABLE(value double, tfloat tfloat)`
`timeSplit(, interval[, timestamptz])`	`TABLE(time timestamptz, )` (4 base types × 2 origin variants)
`valueTimeSplit(tint, integer, interval[, integer[, timestamptz]])`	`TABLE(value bigint, time timestamptz, tint tint)`
`valueTimeSplit(tfloat, double, interval[, double[, timestamptz]])`	`TABLE(value double, time timestamptz, tfloat tfloat)`

Implementation

Mirrors PR #79's spaceSplit/spaceTimeSplit pattern:

• `TileBindData` captures the input temporal blob, scalar tile parameters, and a `TileKind` discriminator (`ValueSplit` / `TimeSplit` / `ValueTimeSplit`).
• `TileInit` calls the matching MEOS export (`tint_value_split` / `tfloat_value_split` / `temporal_time_split` / `tint_value_time_split` / `tfloat_value_time_split`) and buffers the parallel output arrays as Value triples.
• `TileExec` drains the buffer; the cardinality-2 vs cardinality-3 output decision lives at register-time via separate Bind functions but a shared Init/Exec.

Hooked into `LoadInternal` via a new `RegisterTemporalTileSplit` method on `TemporalTypes`, kept distinct from the scalar registrations and the existing `tempUnnest` TableFunction.

Tests

• `test/sql/parity/025_temporal_tile_split.test` — 12 query cases covering all three function names on each supported base type, default-origin and explicit-origin variants, and a 3-column shape check on `valueTimeSplit` output.
• Full suite: 772 assertions / 14 test cases passing under `TZ=UTC`.

Coverage delta

Per the audit in PR #66:

• `temporal/025_temporal_tile` now closes valueSplit / timeSplit / valueTimeSplit. Remaining names in this section: `bins`, `getBin`, `getValueTile`, `getTBoxTimeTile`, `getValueTimeTile`, `timeBins`, `timeBoxes`, `timeTiles`, `valueBins`, `valueBoxes`, `valueTiles`, `valueTimeBoxes`, `valueTimeTiles` — these are LIST(span/tbox)-returning scalar emitters; separate follow-up.

Test plan

• `cmake --build . --target shell unittest` clean
• New parity test passes (20 assertions / 1 case)
• Full suite green (772/14)

[estebanzimanyi]

Superseded by the consolidated PR branch consolidate/tiles-bins-parity. All changes from this PR are included in that branch as a single squashed commit. Please review and merge the consolidated branch instead.