docs: update TOC

Author: alandefreitas

README.md

@@ -51,71 +51,20 @@ Data visualization can help programmers and scientists identify trends in their
   - [
 ](#)
 - [Gallery](#gallery)
-- [Line Plots](#line-plots)
-  - [Line Plot](#line-plot)
-  - [Line Plot 3D](#line-plot-3d)
-  - [Stairs](#stairs)
-  - [Error Bars](#error-bars)
-  - [Area](#area)
-  - [Loglog Plot](#loglog-plot)
-  - [Semilogx Plot](#semilogx-plot)
-  - [Semilogy Plot](#semilogy-plot)
-  - [Function Plot](#function-plot)
-  - [Function Plot 3D](#function-plot-3d)
-  - [Implicit function](#implicit-function)
-- [Data Distribution](#data-distribution)
-  - [Histogram](#histogram)
-  - [Boxplot](#boxplot)
-  - [Scatter Plot](#scatter-plot)
-  - [Scatter Plot 3D](#scatter-plot-3d)
-  - [Binned Scatter Plots](#binned-scatter-plots)
-  - [Plot Matrix](#plot-matrix)
-  - [Parallel Coordinates](#parallel-coordinates)
-  - [Pie Chart](#pie-chart)
-  - [Heatmap](#heatmap)
-  - [Word Cloud](#word-cloud)
-- [Discrete Data](#discrete-data)
-  - [Bar Plot](#bar-plot)
-  - [Pareto Chart](#pareto-chart)
-  - [Stem Plot](#stem-plot)
-  - [Stem Plot 3D](#stem-plot-3d)
-- [Geography](#geography)
-  - [Geoplot](#geoplot)
-  - [Geoscatter Plot](#geoscatter-plot)
-  - [Geobubble](#geobubble)
-  - [Geodensity Plot](#geodensity-plot)
-- [Polar Plots](#polar-plots)
-  - [Polar Line Plot](#polar-line-plot)
-  - [Polar Scatter Plot](#polar-scatter-plot)
-  - [Polar Histogram](#polar-histogram)
-  - [Compass](#compass)
-  - [Polar Function](#polar-function)
-- [Contour Plots](#contour-plots)
-  - [Contour](#contour)
-  - [Filled Contour](#filled-contour)
-  - [Function Contour](#function-contour)
-- [Vector Fields](#vector-fields)
-  - [Quiver](#quiver)
-  - [Quiver 3D](#quiver-3d)
-  - [Feather](#feather)
-- [Surfaces](#surfaces)
-  - [Surface](#surface)
-  - [Surface with Contour](#surface-with-contour)
-  - [Mesh](#mesh)
-  - [Mesh with Contour](#mesh-with-contour)
-  - [Mesh with Curtain](#mesh-with-curtain)
-  - [Function Surface](#function-surface)
-  - [Function Mesh](#function-mesh)
-  - [Waterfall](#waterfall)
-  - [Fence](#fence)
-  - [Ribbon](#ribbon)
-- [Graphs](#graphs)
-  - [Undirected Graph](#undirected-graph)
-  - [Directed Graph](#directed-graph)
-- [Images](#images)
-  - [Image Show](#image-show)
-  - [Image Matrix](#image-matrix)
-  - [Scaled Image](#scaled-image)
+- [Integration](#integration)
+  - [CMake](#cmake)
+  - [Install](#install)
+- [Plot Types](#plot-types)
+  - [Line Plots](#line-plots)
+  - [Data Distribution](#data-distribution)
+  - [Discrete Data](#discrete-data)
+  - [Geography](#geography)
+  - [Polar Plots](#polar-plots)
+  - [Contour Plots](#contour-plots)
+  - [Vector Fields](#vector-fields)
+  - [Surfaces](#surfaces)
+  - [Graphs](#graphs)
+  - [Images](#images)
 - [Annotations](#annotations)
   - [Text](#text)
   - [Text with Arrow](#text-with-arrow)
@@ -147,11 +96,8 @@ Data visualization can help programmers and scientists identify trends in their
   - [Common Utilities](#common-utilities)
   - [Backends](#backends)
   - [Motivation and Details](#motivation-and-details)
-- [Integration](#integration)
-  - [CMake](#cmake)
-  - [Install](#install)
 - [Community](#community)
-  - [Getting involved](#getting-involved)
+  - [Get Involved](#get-involved)
   - [Ideas and Roadmap](#ideas-and-roadmap)
   - [Contributing Guidelines](#contributing-guidelines)
   - [Contributors](#contributors)