Add coc basic config, not fully working yet

nvim-coc/coc-settings.json

@@ -0,0 +1,27 @@
+{
+    "diagnostic.enable": true,
+    "diagnostic.virtualText": true,
+    "diagnostic.floatEnabled": true,
+    "python.pythonPath": "/usr/bin/python3",
+    "suggest.enable": true,
+    "suggest.autoTrigger": "always",
+    "suggest.minTriggerInputLength": 1,
+    "suggest.timeout": 500,
+    "suggest.noselect": false,
+    "suggest.border": "single",
+    "suggest.floatMaxHeight": 20,
+    "suggest.floatMaxWidth": 80,
+    "suggest.menuHeight": 10,
+    "suggest.padding": [0, 1],
+    "snippets.ultisnips.pythonPrompt": false,
+    "languageserver": {
+        "verilog": {
+        "command": "verible-verilog-ls",
+        "filetypes": ["verilog", "systemverilog"],
+        "rootPatterns": ["verible-verilog-ls"]
+        }
+    },
+    "coc.preferences.enablePostfixCompletions": true,
+    "coc.source.buffer.enable": true,
+    "coc.source.file.enable": true
+}