feat(utilities): add transparent plugin

lua/astrocommunity/utility/transparent-nvim/README.md

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+# transparent
+
+**Repository:** <https://github.com/xiyaowong/transparent.nvim>
+
+Remove all background colors to make nvim transparent

lua/astrocommunity/utility/transparent-nvim/transparent-nvim.lua

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+local prefix = "<leader>u"
+return {
+  "xiyaowong/transparent.nvim",
+  lazy = false,
+  opts = {
+    -- table: default groups
+    groups = {
+      "Normal",
+      "NormalNC",
+      "Comment",
+      "Constant",
+      "Special",
+      "Identifier",
+      "Statement",
+      "PreProc",
+      "Type",
+      "Underlined",
+      "Todo",
+      "String",
+      "Function",
+      "Conditional",
+      "Repeat",
+      "Operator",
+      "Structure",
+      "LineNr",
+      "NonText",
+      "SignColumn",
+      "CursorLineNr",
+      "EndOfBuffer",
+    },
+    -- table: additional groups that should be cleared
+    extra_groups = {
+      "NormalFloat",
+      "NvimTreeNormal",
+    },
+    -- table: groups you don't want to clear
+    exclude_groups = {},
+  },
+  keys = {
+    { prefix .. "T", "<cmd>TransparentToggle<CR>", desc = "Toggle transparency" },
+  },
+}