feat: new artifacts path and CLI utility (#876)

* fix artifacts path

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* add docling-models utility

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* missing formatting

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* rename utility to docling-tools

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* rename download methods and deprecation warnings

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* propagate artifacts path usage for ocr models

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* move function to utils

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* remove unused file

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* update docs

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* simplify downloading specific model(s)

Signed-off-by: Panos Vagenas <35837085+vagenas@users.noreply.github.com>

* minor refactor

Signed-off-by: Panos Vagenas <35837085+vagenas@users.noreply.github.com>

---------

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>
Signed-off-by: Panos Vagenas <35837085+vagenas@users.noreply.github.com>
Co-authored-by: Panos Vagenas <35837085+vagenas@users.noreply.github.com>

docling/datamodel/settings.py

@@ -61,5 +61,7 @@ class AppSettings(BaseSettings):
     perf: BatchConcurrencySettings
     debug: DebugSettings
 
+    cache_dir: Path = Path.home() / ".cache" / "docling"
+
 
 settings = AppSettings(perf=BatchConcurrencySettings(), debug=DebugSettings())