refactor(nvim,zsh): remove Mason; use Home-Manager-provisioned tooling

LSPs, formatters, linters, and the lldb-dap debugger now come from
~/.nix-profile/bin (see nix/common.nix). lspconfig keeps the default
configs; we just opt-in via vim.lsp.enable() with an explicit list.

Changes:
  - dot_config/nvim/lua/plugins/lsp.lua: drop mason*, replace
    mason-lspconfig handler with explicit vim.lsp.enable({...}); drop
    groovy/jenkins formatters and lint entries; drop systemd lint
    (nginx + groovy + systemdlint tools dropped per plan).
  - dot_config/nvim/lua/plugins/debug.lua: drop mason-nvim-dap; drop
    codelldb adapter; switch dap.configurations.cpp to type='lldb'
    (lldb-dap is the upstream successor, ships with pkgs.lldb).
  - dot_config/nvim/init.lua: remove mason.nvim, mason-lspconfig.nvim,
    mason-tool-installer.nvim, mason-nvim-dap.nvim from vim.pack.add.
  - dot_config/nvim/lua/config/update.lua: remove MasonToolsUpdateSync.
  - dot_config/zsh/dot_zshrc: flip plugin source order — prefer
    ~/.nix-profile/share, fall back to /usr/share/zsh (was the other
    way around).
  - nix/bootstrap.sh: drop the uv-python3.11 step (no longer needed
    once Mason no longer source-builds Python LSPs on Ubuntu 20.04).

Phase 6 of the nix-on-host migration plan.

1 files changed, 2 insertions, 12 deletions

diff --git a/dot_config/nvim/lua/plugins/debug.lua b/dot_config/nvim/lua/plugins/debug.lua
index bef0d1c..0d97713 100644
--- a/dot_config/nvim/lua/plugins/debug.lua
+++ b/dot_config/nvim/lua/plugins/debug.lua
@@ -22,11 +22,6 @@ dap.adapters.gdb = {
   args = { "--interpreter=dap" },
   env = get_env_vars,
 }
-dap.adapters.codelldb = {
-  type = "executable",
-  command = "codelldb",
-  env = get_env_vars,
-}
 
 local function get_program()
   local _program
@@ -53,8 +48,8 @@ end
 
 dap.configurations.cpp = {
   {
-    name = "codelldb Launch",
-    type = "codelldb",
+    name = "lldb-dap Launch",
+    type = "lldb",
     request = "launch",
     cwd = "${workspaceFolder}",
     program = get_program,
@@ -68,8 +63,3 @@ dap.configurations.c = dap.configurations.cpp
 dap.configurations.rust = dap.configurations.cpp
 
 require("nvim-dap-virtual-text").setup({})
-require("mason-nvim-dap").setup({
-  automatic_installation = false,
-  handlers = {},
-  ensure_installed = {},
-})