feat: knowledge filters- manual + agentic v1 (#3005)

## Summary

Manual user passed filters:
```py
knowledge_base = PDFUrlKnowledgeBase(
    urls=[
        {
            "https://agno-public.s3.amazonaws.com/recipes/ThaiRecipes.pdf": {
                "metadata": {
                    "user_id": "user_2",
                    "source": "Cape Cookbook",
                }
            }
        },
        {
            "https://agno-public.s3.amazonaws.com/recipes/ThaiRecipes.pdf": {
                "metadata": {
                    "user_id": "user_2",
                    "source": "Cape Cookbook",
                }
            }
        },
    ],
    vector_db=vector_db,
    reader=PDFUrlReader(chunk=True),
)
knowledge_base.load()

agent = Agent(
    knowledge=knowledge_base,
    search_knowledge=True,
    knowledge_filters={"user_id": "jordan_mitchell"},
)
```

Agentic filters:
```py
agent = Agent(
    knowledge=knowledge_base,
    search_knowledge=True,
    enable_agentic_filters=True,
)

agent.print_response(
    "Tell me about Jordan Mitchell's experience and skills with user id as jordan_mitchell and document type cv and year as 2025",
    markdown=True,
)
```

The agent automatically figures out which filters to use and applies-

![image](https://github.com/user-attachments/assets/48b98a67-a996-4af1-8797-08b9fb837808)


(If applicable, issue number: #____)

## Type of change

- [ ] Bug fix
- [x] New feature
- [x] Breaking change
- [ ] Improvement
- [ ] Model update
- [ ] Other:

---

## Checklist

- [x] Code complies with style guidelines
- [x] Ran format/validation scripts (`./scripts/format.sh` and
`./scripts/validate.sh`)
- [x] Self-review completed
- [ ] Documentation updated (comments, docstrings)
- [x] Examples and guides: Relevant cookbook examples have been included
or updated (if applicable)
- [x] Tested in clean environment
- [x] Tests added/updated (if applicable)

---

## Additional Notes

Add any important context (deployment instructions, screenshots,
security considerations, etc.)

---------

Co-authored-by: Dirk Brand <dirkbrnd@gmail.com>
Co-authored-by: Yash Pratap Solanky <101447028+ysolanky@users.noreply.github.com>
Co-authored-by: Dirk Brand <51947788+dirkbrnd@users.noreply.github.com>

Author: 3 people

cookbook/agent_concepts/knowledge/filters/__init__.py

@@ -0,0 +1,25 @@
+{
+  "name": "Jordan Mitchell",
+  "position": "Junior Software Engineer",
+  "summary": "Recent Computer Science graduate with strong foundational knowledge in web development and data structures. Passionate about building scalable software solutions.",
+  "experience": [
+    {
+      "title": "Software Engineering Intern",
+      "company": "SnapTech Solutions",
+      "location": "San Francisco, CA",
+      "period": "Jun 2023 – Aug 2023",
+      "responsibilities": [
+        "Worked on front-end components using React and Tailwind CSS",
+        "Optimized internal tools, improving load times by 30%"
+      ]
+    }
+  ],
+  "education": [
+    {
+      "degree": "BSc in Computer Science",
+      "institution": "University of California, Berkeley",
+      "period": "2019 – 2023"
+    }
+  ],
+  "skills": ["JavaScript", "React", "Python", "HTML/CSS", "Git"]
+}

cookbook/agent_concepts/knowledge/filters/data/cv_1.docx

@@ -0,0 +1,15 @@
+Jordan Mitchell
+Junior Software Engineer
+
+Summary:
+Recent Computer Science graduate with strong foundational knowledge in web development and data structures. Passionate about building scalable software solutions.
+
+Experience:
+Software Engineering Intern at SnapTech Solutions, San Francisco, CA (Jun 2023 – Aug 2023)
+- Worked on front-end components using React and Tailwind CSS.
+- Optimized internal tools, improving load times by 30%.
+
+Education:
+BSc in Computer Science, University of California, Berkeley (2019 – 2023)
+
+Skills: JavaScript, React, Python, HTML/CSS, Git

cookbook/agent_concepts/knowledge/filters/data/cv_1.json

@@ -0,0 +1,35 @@
+{
+  "name": "Taylor Brooks",
+  "position": "Software Engineer",
+  "summary": "Experienced full-stack developer with 4 years of experience building RESTful APIs and dynamic web applications.",
+  "experience": [
+    {
+      "title": "Software Engineer",
+      "company": "NeoCode Labs",
+      "location": "Austin, TX",
+      "period": "2021 – Present",
+      "responsibilities": [
+        "Led migration from monolith to microservices architecture",
+        "Implemented CI/CD pipelines reducing deployment time by 40%"
+      ]
+    },
+    {
+      "title": "Junior Developer",
+      "company": "Innovent Solutions",
+      "location": "Austin, TX",
+      "period": "2019 – 2021",
+      "responsibilities": [
+        "Contributed to Angular front-end development",
+        "Maintained PostgreSQL databases"
+      ]
+    }
+  ],
+  "education": [
+    {
+      "degree": "BSc in Software Engineering",
+      "institution": "University of Texas at Austin",
+      "period": "2015 – 2019"
+    }
+  ],
+  "skills": ["Node.js", "Angular", "Docker", "PostgreSQL", "Kubernetes"]
+}

cookbook/agent_concepts/knowledge/filters/data/cv_1.pdf

@@ -0,0 +1,18 @@
+Taylor Brooks
+Software Engineer
+
+Summary:
+Experienced full-stack developer with 4 years of experience building RESTful APIs and dynamic web applications.
+
+Experience:
+Software Engineer at NeoCode Labs, Austin, TX (2021 – Present)
+- Led migration from monolith to microservices architecture.
+- Implemented CI/CD pipelines reducing deployment time by 40%.
+Junior Developer at Innovent Solutions, Austin, TX (2019 – 2021)
+- Contributed to Angular front-end development.
+- Maintained PostgreSQL databases.
+
+Education:
+BSc in Software Engineering, University of Texas at Austin (2015 – 2019)
+
+Skills: Node.js, Angular, Docker, PostgreSQL, Kubernetes