chore(catalog): record boot-3.3.13

[github-actions]

Adds boot 3.3.13 → boot-3.3.13 and the converted tree under markdown/boot/3.3.13/, published by the release workflow.

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Summary by cubic

Adds boot 3.3.13 to the catalog with its converted documentation tree under markdown/boot/3.3.13/.

• Registers the boot-3.3.13 tag and release timestamp in catalog.json.
• Adds 146 pages of Markdown converted from the upstream Spring Boot AsciiDoc.

^{Written for commit fc5661e. Summary will update on new commits.}

[greptile-apps]

PR author is in the excluded authors list.

[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

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

View in Codacy

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TIP This summary will be updated as you push new changes.}

[amondnet]

Superseded by #72, which registers all 45 Spring Boot 3.x releases in one commit — every catalog branch is cut from the default branch, so these 45 pull requests all rewrite the same projects object and cannot merge independently. The release itself is published and unaffected.