Move lsp config to local file structure

.config/nvim/lsp/termux_language_server.lua

@@ -0,0 +1,33 @@
+---@brief
+---
+--- https://github.com/termux/termux-language-server
+---
+--- Language server for various bash scripts such as Arch PKGBUILD, Gentoo ebuild, Termux build.sh, etc.
+
+local util = require('lspconfig').util
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'termux-language-server' },
+  root_dir = function(bufnr, on_dir)
+    local patterns = {
+      -- Termux
+      'build.sh',
+      '*.subpackage.sh',
+      -- Arch/MSYS2
+      'PKGBUILD',
+      'makepkg.conf',
+      '*.install',
+      -- Gentoo
+      'make.conf',
+      'color.map',
+      '*.ebuild',
+      '*.eclass',
+    }
+    local fname = vim.api.nvim_buf_get_name(bufnr)
+    local match = util.root_pattern(patterns)(fname)
+    if match then
+      on_dir(vim.fs.root(match, '.git') or match)
+    end
+  end,
+}