fix(neovim): Rust test-coverage plugin & coding qol improvements

- Rust: `nvim-coverage` for generating code-coverage report
- Rust: Keymaps & nvim-job for test-coverage report display
- Coding-QOL: Remove distracting & noisy diagnostic virtual-line
- Coding-QOL: Keymaps to disable diagnostic virtual text
- Coding-QOL: Disable diagnostic underlines
- Fix: Disable telescope `hightlight` to fix frequent crash
- Coding-QOL: Telescope Keymaps to move between loops
- Coding-QOL: Disable auto fn doc hover through `blink`; `LSPSaga` does
  it better
- Coding-QOL: Adding back `quick-scope` with proper config
- Keymap: Use `ctrl-p` to search files; same as vscode

common/.config/nvim/lua/plugins/code-testing.lua

@@ -121,4 +121,30 @@ return {
             { "<leader>tS", function() require("neotest").summary.toggle() end,                                 desc = "Test: Toggle Summary Panel" },
         },
     },
+
+    {
+        "andythigpen/nvim-coverage",
+        dependencies = { "nvim-lua/plenary.nvim" },
+        config = function()
+            require("coverage").setup({
+                auto_load = true,
+                commands = true, -- Enable coverage commands
+                highlights = {
+                    covered = { fg = "#C3E88D" }, -- Green for covered lines
+                    uncovered = { fg = "#F07178" }, -- Red for uncovered lines
+                },
+                signs = {
+                    covered = { hl = "CoverageCovered", text = "▎" },
+                    uncovered = { hl = "CoverageUncovered", text = "▎" },
+                },
+                summary = {
+                    min_coverage = 80.0, -- Minimum coverage percentage
+                },
+            })
+
+            vim.keymap.set("n", "<leader>tC", function()
+                require("coverage").summary()
+            end, { desc = "Test: Toggle coverage" })
+        end,
+    },
 }