Conversion to Metanorma

[ronaldtse]

The document has been converted to the Metanorma format and provides a corresponding CI action. This was completed in https://github.com/metanorma/ogc-2D-Tile-Matrix-Set/issues/1.

These following issues remain, but they do not affect the correctness of this PR.

• https://github.com/metanorma/ogc-2D-Tile-Matrix-Set/issues/4
  • This is a Metanorma bug tracked at https://github.com/metanorma/metanorma-ogc/issues/383.
• https://github.com/metanorma/ogc-2D-Tile-Matrix-Set/issues/5
  • OGC/Metanorma will investigate
• https://github.com/metanorma/ogc-2D-Tile-Matrix-Set/issues/6
  • OGC/Metanorma will investigate and attempt to fix (by adding the missed bibliographic entries)
• https://github.com/metanorma/ogc-2D-Tile-Matrix-Set/issues/7
  • For project team to investigate

cc @ghobona @gbuehler