Restructure modules/shared and update all imports

- Rename modules/hosts/common to modules/shared
- Split shared into home/general, home/linux, and nixos subdirectories
- Update all import paths in lib/ and modules/hosts/
- Fix hardcoded /Users/ path to use config.home.homeDirectory
- Update .sops.yaml path for secrets

modules/shared/files/nvim/lua/plugins/lsp-config.lua

@@ -0,0 +1,65 @@
+return {
+  {
+    "williamboman/mason.nvim",
+    config = true,
+  },
+  {
+    "williamboman/mason-lspconfig.nvim",
+    config = function()
+      require("mason-lspconfig").setup({
+        ensure_installed = {
+          "lemminx", -- xml
+          "lua_ls", -- lua
+          "nil_ls", -- nix
+          "puppet", -- puppet
+          "ruff", -- python
+        },
+      })
+    end,
+  },
+  {
+    "neovim/nvim-lspconfig",
+    config = function()
+      local on_attach = function(_, _)
+        vim.keymap.set("n", "<leader>rn", vim.lsp.buf.rename, {})
+        vim.keymap.set("n", "<leader>ca", vim.lsp.buf.code_action, {})
+
+        vim.keymap.set("n", "gd", vim.lsp.buf.definition, {})
+        vim.keymap.set("n", "gi", vim.lsp.buf.implementation, {})
+        vim.keymap.set("n", "gr", require("telescope.builtin").lsp_references, {})
+        vim.keymap.set("n", "K", vim.lsp.buf.hover, {})
+      end
+
+      local lspconfig = require("lspconfig")
+      local capabilities = require("cmp_nvim_lsp").default_capabilities()
+
+      lspconfig.lemminx.setup({
+        capabilities = capabilities,
+        on_attach = on_attach,
+      })
+
+      lspconfig.lua_ls.setup({
+        capabilities = capabilities,
+        on_attach = on_attach,
+        settings = { Lua = { diagnostics = { globals = { "vim" } } } },
+      })
+
+      lspconfig.nil_ls.setup({
+        capabilities = capabilities,
+        on_attach = on_attach,
+      })
+
+      local puppet_languageserver = vim.fn.expand(
+        "$HOME/.local/share/nvim/mason/packages/puppet-editor-services/libexec/puppet-languageserver"
+      )
+
+      lspconfig.puppet.setup({
+        capabilities = capabilities,
+        on_attach = on_attach,
+        cmd = { puppet_languageserver, "--feature-flags=puppetstrings" },
+        settings = { puppet = { editorServices = { formatOnType = { enable = true } } } },
+      })
+      lspconfig.ruff.setup({ on_attach = on_attach })
+    end,
+  },
+}