docs: update python docs with creating topic (#537)

* docs: update python docs with creating topic

* docs: update readme with creating topic

* docs: update logo

Author: fraidev

Makefile

@@ -59,7 +59,7 @@ manylinux2014_aarch64:
 manylinux2014_x86_64:
 	python setup.py bdist_wheel --py-limited-api=cp38 --plat-name manylinux2014_x86_64
 
-PDOC_OPTS=--logo='https://www.fluvio.io/images/assets/fluvio-with-text.svg' --favicon='https://www.fluvio.io/images/favicon.ico'
+PDOC_OPTS=--logo='https://www.fluvio.io/img/infinyon-gradient.png' --favicon='https://www.fluvio.io/images/favicon.ico'
 
 docs-serve: venv-pip build-dev
 	$(PYTHON) -m pdoc fluvio $(PDOC_OPTS)

README.md

@@ -24,6 +24,28 @@ This will get the wheel for the os/architecture of the installation system if av
 
 # Example Usage
 
+## Creating a Topic
+
+```python
+fluvio_admin = FluvioAdmin.connect()
+fluvio_admin.create_topic("a_topic")
+```
+
+Or just create a topic with custom settings:
+
+```python
+import fluvio
+
+fluvio_admin = FluvioAdmin.connect()
+topic_spec = (
+    TopicSpec.create()
+    .with_retention_time("1h")
+    .with_segment_size("10M")
+    .build()
+)
+fluvio_admin.create_topic("a_topic", topic_spec)
+```
+
 ## Producer
 ```python
 from fluvio import Fluvio