Move lsp config to local file structure

.config/nvim/lsp/ltex_plus.lua

@@ -0,0 +1,89 @@
+---@brief
+---
+--- https://github.com/ltex-plus/ltex-ls-plus
+---
+--- LTeX Language Server: LSP language server for LanguageTool 🔍✔️ with support for LaTeX 🎓, Markdown 📝, and others
+---
+--- To install, download the latest [release](https://github.com/ltex-plus/ltex-ls-plus) and ensure `ltex-ls-plus` is on your path.
+---
+--- This server accepts configuration via the `settings` key.
+---
+--- ```lua
+---   settings = {
+---     ltex = {
+---       language = "en-GB",
+---     },
+---   },
+--- ```
+---
+--- To support org files or R sweave, users can define a custom filetype autocommand (or use a plugin which defines these filetypes):
+---
+--- ```lua
+--- vim.cmd [[ autocmd BufRead,BufNewFile *.org set filetype=org ]]
+--- ```
+
+local language_id_mapping = {
+  bib = 'bibtex',
+  pandoc = 'markdown',
+  plaintex = 'tex',
+  rnoweb = 'rsweave',
+  rst = 'restructuredtext',
+  tex = 'latex',
+  text = 'plaintext',
+}
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'ltex-ls-plus' },
+  filetypes = {
+    'asciidoc',
+    'bib',
+    'context',
+    'gitcommit',
+    'html',
+    'markdown',
+    'org',
+    'pandoc',
+    'plaintex',
+    'quarto',
+    'mail',
+    'mdx',
+    'rmd',
+    'rnoweb',
+    'rst',
+    'tex',
+    'text',
+    'typst',
+    'xhtml',
+  },
+  root_markers = { '.git' },
+  get_language_id = function(_, filetype)
+    return language_id_mapping[filetype] or filetype
+  end,
+  settings = {
+    ltex = {
+      enabled = {
+        'asciidoc',
+        'bib',
+        'context',
+        'gitcommit',
+        'html',
+        'markdown',
+        'org',
+        'pandoc',
+        'plaintex',
+        'quarto',
+        'mail',
+        'mdx',
+        'rmd',
+        'rnoweb',
+        'rst',
+        'tex',
+        'latex',
+        'text',
+        'typst',
+        'xhtml',
+      },
+    },
+  },
+}