Add Semble plugin to s.json

[debjan]

Added Semble plugin with details and release information.

• I'm the package's author and/or maintainer.
• I have read the docs.
• I have tagged a release with a semver version number.
• My package repo has a description and a README describing what it's for and how to use it.
• My package doesn't add context menu entries. *
• My package doesn't add key bindings. **
• Any commands are available via the command palette.
• Preferences and keybindings (if any) are listed in the menu and the command palette, and open in split view.
• If my package is a syntax it doesn't also add a color scheme. ***
• I use .gitattributes to exclude files from the package: images, test files, sublime-project/workspace.

My package is plugin that integrates the semble CLI tool for semantic code search and related-code discovery directly in editor.

There are no packages like it in Package Control.