Timvt

* switch to `pyproject.toml` and repo cleanup

* update viewer

* Refactor Function Registry to be hosted in the application state (`app.state.function_catalog) as the Table catalog.
* move `timvt.function.Registry` to `timvt.layer.FunctionRegistry`

* update settings management from starlette to pydantic and use `TIMVT_` prefix

* update FastAPI version requirement to allow `>=0.73`

* Faster and cleaner SQL code
* Compare Tile and Table geometries in Table CRS (speedup)
* Allow non-epsg based TileMatrixSet
* update morecantile requirement to `>=3.0.2`
* add `geometry_srid` in Table metadata
* refactor `Function` layers.

**breaking changes**

* Function layer signature change
sql
-- before
CREATE FUNCTION name(
-- bounding box
xmin float,
ymin float,
xmax float,
ymax float,
-- EPSG (SRID) of the bounding box coordinates
epsg integer,
-- additional parameters
value0 int,
value1 int
)
RETURNS bytea

-- now
CREATE FUNCTION name(
-- bounding box
xmin float,
ymin float,
xmax float,
ymax float,
-- EPSG (SRID) of the bounding box coordinates
epsg integer,
-- additional parameters
query_params json
)
RETURNS bytea