config(nvim): add AstroNvim config; font: VictorMono NF via packages

nvim added static from live home; vendored .git/tool-state dirs removed
and ignore-gated against re-add. ttf-victor-mono-nerd (arch) and
font-victor-mono-nerd-font cask (darwin) added to packages manifest.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

dot_config/nvim/lua/plugins/none-ls.lua

@@ -0,0 +1,24 @@
+if true then return {} end -- WARN: REMOVE THIS LINE TO ACTIVATE THIS FILE
+
+-- Customize None-ls sources
+
+---@type LazySpec
+return {
+  "nvimtools/none-ls.nvim",
+  opts = function(_, opts)
+    -- opts variable is the default configuration table for the setup function call
+    -- local null_ls = require "null-ls"
+
+    -- Check supported formatters and linters
+    -- https://github.com/nvimtools/none-ls.nvim/tree/main/lua/null-ls/builtins/formatting
+    -- https://github.com/nvimtools/none-ls.nvim/tree/main/lua/null-ls/builtins/diagnostics
+
+    -- Only insert new sources, do not replace the existing ones
+    -- (If you wish to replace, use `opts.sources = {}` instead of the `list_insert_unique` function)
+    opts.sources = require("astrocore").list_insert_unique(opts.sources, {
+      -- Set a formatter
+      -- null_ls.builtins.formatting.stylua,
+      -- null_ls.builtins.formatting.prettier,
+    })
+  end,
+}