build: configure pytest-django and add dev dependencies

[SherryShijiarui]

No description provided.

[A-lexisL]

1. tests should be comprehensive, so more tests are needed. Please arrange them into classes based on API and Authenticated status.
   e.g.

class TestCourseListAuthenticated
class TestCourseListNotAuthenticated
class TestCourseDetailAuthenticated
...

[A-lexisL]

Missing tests for base_client

[zzjc1234]

Added unauthenticated coverage in TestReviewAPIUnauthenticated for list, personal list, delete, and detail in apps/web/tests/test_review.py. Evidence: .venv/bin/pytest apps/web/tests -> 52 passed.

[zzjc1234]

Added concrete diff for missing base_client tests:

+class TestReviewAPIUnauthenticated:
+    def test_get_course_reviews_anonymous(...):
+    def test_get_personal_reviews_anonymous(...):
+    def test_delete_review_anonymous_forbidden(...):
+    def test_review_detail_anonymous_forbidden(...):

This adds unauthenticated coverage for the review endpoints.

[A-lexisL]

The tests are comprehensive. But some test cases still need polishing.

[A-lexisL]

？

[zzjc1234]

Fixed the term regex test to check 16W, 16w, and 16F separately in apps/web/tests/lib_tests/test_terms.py. Evidence: .venv/bin/pytest apps/web/tests -> 52 passed.

[zzjc1234]

Added concrete diff for the term assertion fix:

 term_data = terms.term_regex.match("16w")
 self.assertTrue(
     term_data
     and term_data.group("year") == "16"
-    and term_data.group("term") == "w"
-    and term_data.group("term") == "F"
+    and term_data.group("term") == "w"
 )
+term_data = terms.term_regex.match("16F")
+self.assertTrue(
+    term_data
+    and term_data.group("year") == "16"
+    and term_data.group("term") == "F"
+)

This removes the contradictory condition and tests both cases explicitly.