Initial neovim config

Lazy.nvim plugin manager, LSP (rust-analyzer, clangd, ts_ls, zls),
treesitter, telescope, bufferline, neo-tree, gitsigns, lazygit,
alabaster theme, persistence sessions, nvim-cmp, lualine, which-key.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

lua/plugins/bufferline.lua

@@ -0,0 +1,19 @@
+return {
+  "akinsho/bufferline.nvim",
+  dependencies = { "nvim-tree/nvim-web-devicons" },
+  lazy = false,
+  opts = {
+    options = {
+      diagnostics = "nvim_lsp",
+      offsets = {
+        { filetype = "neo-tree", text = "Explorer", separator = true },
+      },
+      show_close_icon = false,
+      separator_style = "thin",
+    },
+  },
+  keys = {
+    { "<leader>bp", "<cmd>BufferLineTogglePin<cr>", desc = "Pin buffer" },
+    { "<leader>bo", "<cmd>BufferLineCloseOthers<cr>", desc = "Close other buffers" },
+  },
+}