docs:bio: add manhattanplot documentation

Author: smallstepman

doc/python/bio-manhattanplot.md

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+---
+jupyter:
+  celltoolbar: Tags
+  jupytext:
+    notebook_metadata_filter: all
+    text_representation:
+      extension: .md
+      format_name: markdown
+      format_version: '1.3'
+      jupytext_version: 1.13.0
+  kernelspec:
+    display_name: Python 3 (ipykernel)
+    language: python
+    name: python3
+  language_info:
+    codemirror_mode:
+      name: ipython
+      version: 3
+    file_extension: .py
+    mimetype: text/x-python
+    name: python
+    nbconvert_exporter: python
+    pygments_lexer: ipython3
+    version: 3.9.7
+  plotly:
+    display_as: bio
+    language: python
+    layout: base
+    name: Volcano plot
+    order: 1
+    page_type: u-guide
+    permalink: python/volcano-plot/
+    thumbnail: thumbnail/volcano-plot.png
+---
+
+## Manhattan Plot
+
+An example of a default ManhattanPlot component without any extra properties.
+
+```python
+import pandas as pd
+import dash_bio as dashbio
+
+df = pd.read_csv('https://raw.githubusercontent.com/plotly/dash-bio-docs-files/master/manhattan_data.csv')
+
+
+dashbio.ManhattanPlot(
+    dataframe=df,
+)
+```
+
+## Highlighted points color, and colors of the suggestive line and the genome-wide line.
+Change the color of the points that are considered significant.
+
+```python
+import pandas as pd
+import dash_bio as dashbio
+
+
+df = pd.read_csv('https://raw.githubusercontent.com/plotly/dash-bio-docs-files/master/manhattan_data.csv')
+
+dashbio.ManhattanPlot(
+    dataframe=df,
+    highlight_color='#00FFAA',
+    suggestiveline_color='#AA00AA',
+    genomewideline_color='#AA5500'
+)
+```
+
+## ManhattanPlot with Dash
+
+```python no_display=true
+from IPython.display import IFrame
+snippet_url = 'https://dash-gallery.plotly.host/python-docs-dash-snippets/'
+IFrame(snippet_url + 'bio-manhattanplot', width='100%', height=630)
+```