Add Ability to Summarize Documents (#800)

* Uses entire file text and summarizer model to generate document summary.
* Uses the contents of the user's query to create a tailored summary.
* Integrates with File Filters #788 for a better UX.

tests/conftest.py

@@ -19,6 +19,7 @@ from khoj.database.models import (
     KhojUser,
     LocalMarkdownConfig,
     LocalOrgConfig,
+    LocalPdfConfig,
     LocalPlaintextConfig,
 )
 from khoj.processor.content.org_mode.org_to_entries import OrgToEntries
@@ -415,6 +416,18 @@ def org_config_with_only_new_file(new_org_file: Path, default_user: KhojUser):
     return LocalOrgConfig.objects.filter(user=default_user).first()
 
 
+@pytest.fixture(scope="function")
+def pdf_configured_user1(default_user: KhojUser):
+    LocalPdfConfig.objects.create(
+        input_files=None,
+        input_filter=["tests/data/pdf/singlepage.pdf"],
+        user=default_user,
+    )
+    # Index Markdown Content for Search
+    all_files = fs_syncer.collect_files(user=default_user)
+    success = configure_content(all_files, user=default_user)
+
+
 @pytest.fixture(scope="function")
 def sample_org_data():
     return get_sample_data("org")