Add Item Generator, Text Generator, and Recordshots (Speaway)

[Aegyip]

Summary

Adds three new plugins by Speaway, each in its own commit on master, using the current folder format (plugins/<id>/<id>.js) with matching metadata in plugins.json.

1. Item Generator (item_generator v2.1.0) - Minecraft block/item generator with live vanilla textures from mcasset.cloud
2. Text Generator (text_generator v1.0.0) - 3D block-style text (built-in + custom fonts); includes about.md
3. Recordshots (recordshots v1.3.1) - Screenshot + Record: batch stills from camera angles; in Animate mode export APNG/GIF/PNG sequence or MP4 via local FFmpeg

Commits

• Add Item Generator (v2.1.0) plugin
• Add Text Generator (v1.0.0) plugin
• Add Recordshots (v1.3.1) plugin

Checklist (submission guidelines)

• snake_case plugin IDs match folder/file names
• Metadata identical in plugin files and plugins.json
• Minecraft tags (max 3 per plugin)
• min_version set for current folder structure
• npm run validate passed for all three plugins
• English UI; no remote code execution; no unnecessary bundled deps

Test plan

• Install each plugin from File > Plugins
• Item Generator: create a block/item and confirm textures
• Text Generator: create text with a built-in font
• Recordshots: screenshot in Edit; record APNG/GIF in Animate; MP4 if FFmpeg is available