feat: integrate Jinja2 templating for agent responses and memory consolidation

- Added Jinja2 template support for various agent responses, including identity, skills, and memory consolidation.
- Introduced new templates for evaluating notifications, handling subagent announcements, and managing platform policies.
- Updated the agent context and memory modules to utilize the new templating system for improved readability and maintainability.
- Added a new dependency on Jinja2 in pyproject.toml.

pyproject.toml

@@ -48,6 +48,7 @@ dependencies = [
     "chardet>=3.0.2,<6.0.0",
     "openai>=2.8.0",
     "tiktoken>=0.12.0,<1.0.0",
+    "jinja2>=3.1.0,<4.0.0",
 ]
 
 [project.optional-dependencies]