Enhance LSP for multi-editor support

[rahulyadav-57]

• [x] Support for Editor/IDE with file system access
• [ ] Support for Monaco and other browser-based editors

To use the LSP with other editors, refer to tact-extracted-ls.

Resolves #35

[logvik]

Thank you for your contribution! I'll check it next weekend.

[novusnota]

This PR also resolves #29, as it enables formatting capabilities in the LS :rocket: