Category comments do not work when generating from simulator

[filips123]

Bug Template

Describe the bug

When using auto-generation from the simulator, the category comments for namespaces do not work, as they are simply ignored.

To Reproduce

1. Configure core lib to use auto-generated blocks (create sims.d.ts file, add it to pxt.json).

2. Create a simulator file that exposes some blocks in a category:

   /**
    * Provides access to basic micro:bit functionality.
    */
   //% color=#1E90FF weight=116 icon="\uf00a"
   namespace pxsim.basic {
       /**
        * Repeat the code forever in the background
        * @param body code to execute
        */
       //% help=functions/forever weight=55
       //% blockId=device_forever block="forever" afterOnStart=true
       export function forever (body: RefAction): void {
           thread.forever(body)
       }
   
       /**
        * Pause for the specified time in milliseconds
        * @param ms how long to pause for, eg. 100, 200, 500, 1000, 2000
        */
       //% help=functions/pause weight=54
       //% blockId=device_pause block="pause (ms) %pause"
       export function pause (ms: number): void {
           if (isNaN(ms)) ms = 20
           thread.pause(ms)
       }
   }

3. See that sims.d.ts does not contain the category comment:

   // Auto-generated from simulator. Do not edit.
   declare namespace basic {
       /**
        * Repeat the code forever in the background
        * @param body code to execute
        */
       //% help=functions/forever weight=55
       //% blockId=device_forever block="forever" afterOnStart=true
       //% shim=basic::forever
       function forever(body: () => void): void;
   
       /**
        * Pause for the specified time in milliseconds
        * @param ms how long to pause for, eg. 100, 200, 500, 1000, 2000
        */
       //% help=functions/pause weight=54
       //% blockId=device_pause block="pause (ms) %pause"
       //% shim=basic::pause
       function pause(ms: number): void;
   
   }
   
   // Auto-generated. Do not edit. Really.

Expected behavior

The category comment should be present and applied correctly in the editor.