move language description and themes to vscode-solidity-language

[tintinweb]

Let's move the language description and themes to a new web-compatible extension called vscode-solidity-language. This allows us to install the passive language support on VSCode Web/ github.dev 🙌 🙌 (most of the active features are unfortunately not yet supported on the web version of vscode).

• new repo/extension hosting the passive solidity language config --> https://github.com/tintinweb/vscode-solidity-language (https://marketplace.visualstudio.com/items?itemName=tintinweb.vscode-solidity-language)
• this extension now depends on vscode-solidity-language

This might mess up the current theme or theme selection on first install? To be tested.

[tintinweb]

Here's an example for vscode-solidity-language with an openzeppelin solidity repo loaded. (this is in the browser 🤯 😄)