feat: simple method to generate a json schema based on a lua table

lua/lsp-settings/schema.lua

@@ -0,0 +1,40 @@
+local M = {}
+
+-- try to create a simple schema from a given value
+function M.to_schema(value)
+  if value == nil then
+    return { type = "null" }
+  elseif type(value) == "boolean" then
+    return { type = "boolean", default = value, description = "boolean" }
+  elseif type(value) == "string" then
+    return { type = "string", default = value, description = "string" }
+  elseif type(value) == "number" then
+    return { type = "number", default = value, description = "number" }
+  end
+
+  if vim.tbl_islist(value) then
+    return { type = "array", default = value, description = "array" }
+  end
+
+  if type(value) == "table" then
+    local obj = { type = "object", properties = {} }
+    for k, v in pairs(value) do
+      obj.properties[k] = M.to_schema(v)
+    end
+    return obj
+  end
+  return { type = "null" }
+end
+
+function M.plugin_schema(name, obj, description)
+  local schema = M.to_schema(obj)
+  schema.description = description
+  return {
+    type = "object",
+    properties = {
+      [name] = schema,
+    },
+  }
+end
+
+return M