Revert "Remove markdown from git tracking (#139)"

This reverts commit bbb6e3f309.

markdown/bitburner.ns.clear.md

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+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [bitburner](./bitburner.md) &gt; [NS](./bitburner.ns.md) &gt; [clear](./bitburner.ns.clear.md)
+
+## NS.clear() method
+
+Clear data from a file.
+
+<b>Signature:</b>
+
+```typescript
+clear(handle: string): void;
+```
+
+## Parameters
+
+|  Parameter | Type | Description |
+|  --- | --- | --- |
+|  handle | string | Text file to clear. |
+
+<b>Returns:</b>
+
+void
+
+## Remarks
+
+RAM cost: 0 GB
+
+Delete all data from that text file.
+