fix: remove duplicate AsyncAPI spec loading in fromTemplate command

[armorbreak001]

Fixes #2017

Changes

• Removed redundant second load(asyncapi) call in fromTemplate.ts
• Reused the result from loadAsyncAPIInput(asyncapi) as the specification variable
• Removed unused load import
• The AsyncAPI file is now loaded and parsed only once, eliminating duplicate disk I/O and parsing overhead

Verification

1. Run: asyncapi generate fromTemplate asyncapi.yaml @asyncapi/html-template -o out
2. Verify generation works correctly (no functional change)
3. Confirm only one file load occurs (add a console.log in load() to verify single invocation)

[changeset-bot]

⚠️ No Changeset found

Latest commit: 3f7799c

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud