migrate nvim config to 0.12.0: vim.pack, ui2, snacks -> mini, just general spring cleaning

nvim/plugin/tiny-inline-diagnostics.lua

@@ -0,0 +1,11 @@
+require("tiny-inline-diagnostic").setup({
+    preset = "modern",
+    transparent_bg = false,
+    transparent_cursorline = false,
+    options = {
+        multilines = {
+            enabled = true,
+            always_show = true,
+        },
+    },
+})