[feat] experimental support for ARROW:extension:point

[igorDykhta]

• adds support for ARROW:extension:name EXTENSION_NAME.POINT position columns in Point, Line, Arc, Text and Heatmap layers.
• interleaved xy geo buffer is supplied directly as a position data attribute for rendering.
• this PR doesn't affect existing loading and support of non-geo columns.

Known issues:

• text layer supplied with ARROW:extension:point column can only render string arrow columns.

• figure out how to store an Arrow table in Arrow Data containers, and to update it properly with progressive loading.

• [ ] check whether changes in esbuild.config.mjs are required after loaders bump