feat: add factory for ocr engines via plugins (#1010)

* add factory for ocr engines

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

* apply pre-commit after rebase

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

* add picture description factory

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

* fix enable option

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

* switch to create methods

Signed-off-by: Panos Vagenas <pva@zurich.ibm.com>

* make `options` an explicit kwarg

Signed-off-by: Panos Vagenas <pva@zurich.ibm.com>

* keep old lock of docling-core

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

* fix lock

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

* add allow_external_plugins option

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

* add factory return and ignore options type

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

---------

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>
Signed-off-by: Panos Vagenas <pva@zurich.ibm.com>
Co-authored-by: Panos Vagenas <pva@zurich.ibm.com>

pyproject.toml

@@ -88,6 +88,7 @@ accelerate = [
 ]
 pillow = ">=10.0.0,<12.0.0"
 tqdm = "^4.65.0"
+pluggy = "^1.0.0"
 pylatexenc = "^2.10"
 
 [tool.poetry.group.dev.dependencies]
@@ -156,6 +157,9 @@ rapidocr = ["rapidocr-onnxruntime", "onnxruntime"]
 docling = "docling.cli.main:app"
 docling-tools = "docling.cli.tools:app"
 
+[tool.poetry.plugins."docling"]
+"docling_defaults" = "docling.models.plugins.defaults"
+
 [build-system]
 requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"