Add table of contents

Frequently-asked-Questions--Common-Questions.md

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 This page will go over some of the common questions new users have when starting out using raylib.
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+__Table Of Contents__
+- [How do I remove the log?](#how-do-i-remove-the-log)
+- [How do I make a timer?](#how-do-i-make-a-timer)
+- [What do all the fields in Camera2d mean?](#what-do-all-the-fields-in-camera2d-mean)
+- [How do I center text on the screen?](#how-do-i-center-text-on-the-screen)
+- [Why does calling `LoadTexture` crash my program?](#why-does-calling--loadtexture--crash-my-program)
+- [How can I draw a texture flipped?](#how-can-i-draw-a-texture-flipped)
+- [Why is my render texture upside down?](#why-is-my-render-texture-upside-down)
+- [How do I create a depth texture?](#how-do-i-create-a-depth-texture)
+
 # How do I remove the log?
 
 Call `SetTraceLogLevel(LOG_NONE)` before `InitWindow`