doc: split TOC into two rows (#16397)

doc/docs.md

@@ -62,6 +62,9 @@ To do so, run the command `v up`.
         * [Array slices](#array-slices)
     * [Fixed size arrays](#fixed-size-arrays)
     * [Maps](#maps)
+
+</td><td width=33% valign=top>
+
 * [Module imports](#module-imports)
     * [Selective imports](#selective-imports)
     * [Module import aliasing](#module-import-aliasing)
@@ -86,7 +89,7 @@ To do so, run the command `v up`.
     * [Embedded structs](#embedded-structs)
 * [Unions](#unions)
 
-</td><td width=33% valign=top>
+</td><td valign=top>
 
 * [Functions 2](#functions-2)
     * [Immutable function args by default](#immutable-function-args-by-default)
@@ -105,6 +108,10 @@ To do so, run the command `v up`.
 * [Modules](#modules)
     * [Create modules](#create-modules)
     * [init functions](#init-functions)
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+</td></tr>
+<tr><td width=33% valign=top>
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 * [Type Declarations](#type-declarations)
     * [Interfaces](#interfaces)
     * [Function Types](#function-types)
@@ -132,11 +139,11 @@ To do so, run the command `v up`.
     * [Control](#control)
     * [Stack and Heap](#stack-and-heap)
 * [ORM](#orm)
-
-</td><td valign=top>
-
 * [Writing documentation](#writing-documentation)
     * [Newlines in Documentation Comments](#newlines-in-documentation-comments)
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+</td><td width=33% valign=top>
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 * [Tools](#tools)
     * [v fmt](#v-fmt)
     * [v shader](#v-shader)
@@ -163,6 +170,9 @@ To do so, run the command `v up`.
         * [C Backend binaries Default](#c-backend-binaries-default)
         * [Native Backend binaries](#native-backend-binaries)
         * [Javascript Backend](#javascript-backend)
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+</td><td valign=top>
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 * [V and C](#v-and-c)
 	* [Calling C from V](#calling-c-from-v)
 	* [Calling V from C](#calling-v-from-c)