feat(nvim): add LaTeX workflow; tweak Hyprland master; refresh CS autoexec; add GTK bookmark

Neovim (LaTeX):
- Add TeX ftplugin: spell (en_US,de_DE), soft-wrap + linebreak, conceal=2, no hard wrap
- Add plugins: vimtex (zathura; latexmk with LuaLaTeX + shell-escape),
  LTeX language server via astrolsp + ltex_extra (check on save; motherTongue=de-DE),
  blink.cmp integration (cmp-vimtex, cmp-latex-symbols → insert macros),
  LuaSnip LaTeX snippets, Treesitter “latex”, nabla.nvim (inline/popup math; <leader>mp/<leader>mv)

Hyprland:
- Set master.orientation=left; comment out center_master_* options

Counter-Strike autoexec:
- Rebind +lookatweapon → MOUSE5; map R → lastinv; radio on Y/U/I/H; J → +radialradio
- Crosshair tweaks: size 2.5, gap -3, no outline, alpha off
- Mouse: sensitivity 0.619; zoom_sensitivity_ratio 1.0
- Viewmodel: offset_x -2; cl_prefer_lefthanded 0
- Video/perf: gamma 1.6; set fps_max/fps_max_ui 0; drop legacy perf/network cvars (mat_queue_mode, cl_forcepreload, rate/interp*)
- HUD cleanup: disable target ID; remove +cl_show_team_equipment

GTK:
- Add bookmark: Documents/ttrpg/dsa5

.config/nvim/lua/plugins/ltex.lua

@@ -0,0 +1,54 @@
+-- Grammar & spell checking for LaTeX/Markdown via LanguageTool (LTeX-LS)
+return {
+  -- Tell AstroLSP to manage the ltex server and pass our settings
+  {
+    "AstroNvim/astrolsp",
+    ---@param opts AstroLSPOpts
+    opts = function(_, opts)
+      opts.servers = opts.servers or {}
+      if not vim.tbl_contains(opts.servers, "ltex") then table.insert(opts.servers, "ltex") end
+
+      -- Extend the ltex server configuration
+      opts.config = require("astrocore").extend_tbl(opts.config or {}, {
+        ltex = {
+          filetypes = { "tex", "plaintex", "bib", "markdown" },
+          settings = {
+            ltex = {
+              -- Run checks on save for performance; switch to "edit" if you prefer live feedback
+              checkFrequency = "save",
+              -- Pick the language you want LTeX to check as the document language
+              language = "en-US",
+              -- Mother tongue helps the grammar engine (adjust to your preference)
+              additionalRules = { motherTongue = "de-DE" },
+              -- Let ltex_extra manage dictionaries/rules on disk
+              dictionary = {},
+              disabledRules = {},
+              hiddenFalsePositives = {},
+            },
+          },
+          -- hook up ltex_extra when the server attaches
+          on_attach = function(client, bufnr)
+            local ok, ltex_extra = pcall(require, "ltex_extra")
+            if ok then
+              ltex_extra.setup {
+                -- load both EN+DE dictionaries; change to your set
+                load_langs = { "en-US", "de-DE" },
+                init_check = true,
+                -- store per-project files in .ltex (add to .gitignore if you want)
+                path = ".ltex",
+                log_level = "none",
+              }
+            end
+          end,
+        },
+      })
+    end,
+  },
+
+  -- Companion plugin: add-to-dictionary / disable-rule / hide-false-positive
+  {
+    "barreiroleo/ltex_extra.nvim",
+    ft = { "tex", "plaintex", "markdown" },
+    lazy = true,
+  },
+}