Added documentation example

May be used as-is or put in the code in the future.
I'm not sure yet, and I'll vibe code something since the PB tool for doc has "issues"...

Documentation/English/Enumerations/aaa.md

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+# _MsgPack_ErrorCodes
+
+## Values
+
+<table>
+    <thead>
+        <th>Name</th>
+        <th>Details</th>
+    </thead>
+    <tbody>
+        <tr>
+            <td><code>#MsgPack_Error_Success</code></td>
+            <td>???</td>
+        </tr>
+        <tr></tr>
+        <tr>
+            <td><code>#MsgPack_Error_NullPointerGiven</code></td>
+            <td>Returned whenever a function receives a <code>#Null</code> pointer to/for a [???] structure.</td>
+        </tr>
+        <tr>
+            <td><code>#MsgPack_Error_BufferTooSmall</code></td>
+            <td>???</td>
+        </tr>
+        <tr>
+            <td><code>#MsgPack_Error_FailedToGrowBuffer</code></td>
+            <td>???</td>
+        </tr>
+        <tr>
+            <td><code>#MsgPack_Error_AtOrPastTheEndOfBuffer</code></td>
+            <td>???</td>
+        </tr>
+        <tr>
+            <td><code>#MsgPack_Error_ReadPastEndOfBuffer</code></td>
+            <td>???</td>
+        </tr>
+        <tr>
+            <td><code>#MsgPack_Error_InvalidFormatCode</code></td>
+            <td>???</td>
+        </tr>
+        <tr></tr>
+        <tr>
+            <td><code>#MsgPack_Error_BinaryDataSizeIsNegative</code></td>
+            <td>???</td>
+        </tr>
+        <tr>
+            <td><code>#MsgPack_Error_BinaryDataSizeIsTooBig</code></td>
+            <td>???</td>
+        </tr>
+        <tr></tr>
+        <tr>
+            <td><code>#MsgPack_Error_CannotGrowBufferDueToConfig</code></td>
+            <td>???</td>
+        </tr>
+    </tbody>
+</table>
+

Documentation/English/Functions/MsgPackWriteNull.txt.md

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+# MsgPackWriteNull
+
+
+## Syntax
+```purebasic
+Result.MsgPack_ErrorCode = MsgPackWriteNull(*MsgPackData.MsgPackData)
+```
+
+
+## Description
+Writes a null field in the given MessagePack at its current offset.
+
+The offset may be grown if required, and if ´MsgPackData\Flags´ has ´???´ unset. \
+The offset may be incremented if the ´MsgPackData\Flags´ has ´???´ set.
+
+
+## Parameters
+
+
+
+## Return value
+Returns `#MsgPack_Error_Success` on success.
+
+Returns other error constants on failure:
+* `#MsgPack_Error_NullPointerGiven` if `MsgPackData` parameter is `#Null`
+* ???
+* ???
+
+In all cases, except for ´#MsgPack_Error_NullPointerGiven´, the value of ´MsgPackData\LastError´ will contains the returned code.
+
+
+## Supports
+### Compiler
+* PureBasic 5.70+
+* PureBasic 6.xx - ASM
+* PureBasic 6.xx - GCC
+
+### OS
+* Windows
+* Linux
+* MacOS *(Untested)*
+
+### CPU
+* x86
+* x64
+* arm64

Documentation/English/Structures/MsgPackData.md

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+# MsgPackData
+
+## Overview
+Obscure structure that 
+
+## Structure
+
+```purebasic
+Structure MsgPackData
+	; Offset used when reading or writing.
+	BufferOffset.i
+	
+	; Used in place of `MemorySize()` to reduce syscalls.
+	BufferSize.i
+	
+	; Temp mechanism for buffer growth.
+	BufferGrowthIncrements.i
+
+	; IteratorSizeLeft, or snoething like this.
+	
+	; LastError code
+	LastError.MsgPack_ErrorCode
+	
+	; TODO
+	DataFlags.MsgPack_DataFlag
+	
+	; Pointer to a data buffer.
+	; Can be freed by the caller or this module.
+	*Buffer
+EndStructure
+```
+
+## Fields
+
+<table>
+    <thead>
+        <th>Name</th>
+        <th>Type</th>
+        <th>Details</th>
+    </thead>
+    <tbody>
+        <tr>
+            <td><code>BufferOffset</code></td>
+            <td><code>.i</code></td>
+            <td>Internal offset into **Buffer*</td>
+        </tr>
+        <tr>
+            <td><code>BufferSize</code></td>
+            <td><code>.i</code></td>
+            <td>...</td>
+        </tr>
+        <tr>
+            <td><code>BufferGrowthIncrements</code></td>
+            <td><code>.i</code></td>
+            <td>...</td>
+        </tr>
+        <tr>
+            <td><code>LastError</code></td>
+            <td><code>.MsgPack_ErrorCode</code></td>
+            <td>...</td>
+        </tr>
+        <tr>
+            <td><code>DataFlags</code></td>
+            <td><code>.MsgPack_DataFlag</code></td>
+            <td>...</td>
+        </tr>
+        <tr>
+            <td><code>Buffer</code></td>
+            <td><i>Pointer</i></td>
+            <td>...</td>
+        </tr>
+    </tbody>
+</table>
+