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

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markdown/bitburner.singularity.isbusy.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; [Singularity](./bitburner.singularity.md) &gt; [isBusy](./bitburner.singularity.isbusy.md)
+
+## Singularity.isBusy() method
+
+Check if the player is busy.
+
+<b>Signature:</b>
+
+```typescript
+isBusy(): boolean;
+```
+<b>Returns:</b>
+
+boolean
+
+True if the player is currently performing an ‘action’, false otherwise.
+
+## Remarks
+
+RAM cost: 0.5 GB \* 16/4/1
+
+Returns a boolean indicating whether or not the player is currently performing an ‘action’. These actions include working for a company/faction, studying at a university, working out at a gym, creating a program, committing a crime, or carrying out a Hacking Mission.
+