feat(nix): add LSPs/formatters/linters/DAPs to common.nix

Replaces Mason entirely (phase p6 of the nix migration will rip out
mason-tool-installer and friends). The set tracks the previous
ensure_installed list in nvim's lsp.lua, with five niche tools dropped
per the migration plan:

  - groovy-language-server, npm-groovy-lint
  - nginx-language-server, nginx-config-formatter
  - systemdlint

systemd-lsp is renamed to systemd-language-server (the nixpkgs attr
name). codelldb is replaced by lldb-dap (upstream successor, ships with
pkgs.lldb); dap configs switch in phase p6.

Drops jre, basedpyright, cargo, rustc from vm.nix — they only existed
to work around Mason quirks on Ubuntu 20.04 (uv-python wheel
incompatibility, source-build needs). With Mason gone, basedpyright
comes from nixpkgs cleanly on both profiles.

Phase 5 of the nix-on-host migration plan.

1 files changed, 0 insertions, 12 deletions

diff --git a/nix/vm.nix b/nix/vm.nix
index d003b6e..7445b7b 100644
--- a/nix/vm.nix
+++ b/nix/vm.nix
@@ -18,18 +18,6 @@
   };
 
   home.packages = with pkgs; [
-    # ── Mason-driven LSP carve-outs (removed by phase p6 once Mason is
-    #    gone and LSPs come from common.nix directly). Kept here for
-    #    now so the VM keeps working between phases. ───────────────────────
-    jre                  # Mason's groovy-language-server (headless Java)
-    basedpyright         # Mason's pypi distro can't install on Ubuntu 20.04
-                         # (manylinux_2_28 wheels, uv's python rejects)
-    # Rust toolchain for Mason packages whose only install source is
-    # `cargo install` (shellharden). The Arch host has these via pacman;
-    # on the VM Mason needs cargo+rustc on PATH or it bails with ENOENT.
-    cargo
-    rustc
-
     # ── Rootless podman ─────────────────────────────────────────────────────
     # The nix `podman` is wrapped to find these helpers via /nix/store
     # paths, so we don't need to write a containers.conf for