feat: switch vhdl-ls to new rust packaging method

chore: move modules to modules subfolder

chore: update rust packages and their deps

ruther: vhdl-ls: Update to 0.83

* ruther/packages/vhdl-ls.scm (rust-vhdl-lang-macros-0.82): Remove variable.
* ruther/packages/vhdl-ls.scm (rust-vhdl-lang-0.82): Remove variable.
* ruther/packages/vhdl-ls.scm (rust-vhdl-lang-macros-0.83): Add new variable.
* ruther/packages/vhdl-ls.scm (rust-vhdl-lang-0.83): Add new variable.
* ruther/packages/vhdl-ls.scm (vhdl-ls): Update to 0.83, along with dependencies.

fix: vhdl-ls missing vhdl_libraries

feat: add vhdl_ls