Feature request: ST_LineLocatePoint

[ST_LineLocatePoint](https://postgis.net/docs/ST_LineLocatePoint.html) to return a float between 0 and 1 representing the location of the closest point on a LineString to the given point, as a fraction of [ST_Length](https://duckdb.org/docs/stable/core_extensions/spatial/functions#st_length) length. This will complement [ST_LineInterpolatePoint](https://duckdb.org/docs/stable/core_extensions/spatial/functions#st_lineinterpolatepoint) that returns a point interpolated along a line at a fraction of total 2D length.