direnv: init and populate 'integrations' namespace; add TS highlighting

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I78cd545cb9c3b85d7405e9f4723f15066a6a6964

lua/direnv/integrations/statusline.lua

@@ -0,0 +1,41 @@
+local M = {}
+
+-- Cache for statusline data
+local cache = {
+   status = nil,
+   last_check = 0,
+}
+
+-- Get direnv status for statusline integration
+--- @param config table Direnv configuration
+--- @return string status_string
+M.statusline = function(config)
+   local statusline_config = config.integrations and config.integrations.statusline or config.statusline
+   
+   if not statusline_config or not statusline_config.enabled then
+      return ""
+   end
+
+   if cache.status == 0 then
+      return statusline_config.icon .. " active"
+   elseif cache.status == 1 then
+      return statusline_config.icon .. " pending"
+   elseif cache.status == 2 then
+      return statusline_config.icon .. " blocked"
+   else
+      return ""
+   end
+end
+
+-- Update the cached status from the main module
+--- @param status number|nil The direnv status
+M.update_status = function(status)
+   cache.status = status
+end
+
+-- Refresh the statusline cache
+M.refresh = function()
+   cache.last_check = 0
+end
+
+return M