feat(health): support checkhealth for plugins and providers (#769)

lua/avante/health.lua

@@ -0,0 +1,44 @@
+local M = {}
+local H = require("vim.health")
+local Utils = require("avante.utils")
+local Config = require("avante.config")
+
+M.check = function()
+  H.start("avante.nvim")
+
+  -- Required dependencies
+  local required_plugins = {
+    ["nvim-treesitter"] = "nvim-treesitter/nvim-treesitter",
+    ["dressing.nvim"] = "stevearc/dressing.nvim",
+    ["plenary.nvim"] = "nvim-lua/plenary.nvim",
+    ["nui.nvim"] = "MunifTanjim/nui.nvim",
+  }
+
+  for plugin_name, plugin_path in pairs(required_plugins) do
+    if Utils.has(plugin_name) then
+      H.ok(string.format("Found required plugin: %s", plugin_path))
+    else
+      H.error(string.format("Missing required plugin: %s", plugin_path))
+    end
+  end
+
+  -- Optional dependencies
+  local has_devicons = Utils.has("nvim-web-devicons")
+  local has_mini_icons = Utils.has("mini.icons") or Utils.has("mini.nvim")
+  if has_devicons or has_mini_icons then
+    H.ok("Found icons plugin (nvim-web-devicons or mini.icons)")
+  else
+    H.warn("No icons plugin found (nvim-web-devicons or mini.icons). Icons will not be displayed")
+  end
+
+  -- Check Copilot if configured
+  if Config.providers and Config.providers == "copilot" then
+    if Utils.has("copilot.lua") or Utils.has("copilot.vim") then
+      H.ok("Found Copilot plugin")
+    else
+      H.error("Copilot provider is configured but neither copilot.lua nor copilot.vim is installed")
+    end
+  end
+end
+
+return M