Function parse

parse(content: string): { topic: string }
Parser for topic tags - defines MQTT topic path with placeholders

This parser handles the topic tag that defines MQTT topic paths. It extracts:
- Complete topic path with placeholders
- Validates topic format
Parameters
- content: string
  Raw content from the topic tag
Returns { topic: string }
Parsed topic information or null if parsing fails
Example: Topic with placeholders
```
// Input: "v1/{tenant}/devices/{deviceId}/telemetry"
// Output: { topic: "v1/{tenant}/devices/{deviceId}/telemetry" }
```
Example: Simple topic
```
// Input: "sensors/temperature"
// Output: { topic: "sensors/temperature" }
```
Example: Topic with wildcards
```
// Input: "devices/+/status"
// Output: { topic: "devices/+/status" }
```
Since
4.1.0

Public
- Defined in core/parsers/mqtt_topic.ts:33