Add C_NamePlate and WeakAuras modules

- Introduced C_NamePlate for nameplate-related functions, including GetNamePlateForUnit and GetNamePlates.
- Added WeakAuras module with various utility functions and methods for managing aura conditions and tooltips.

C_NamePlate.lua

@@ -0,0 +1,15 @@
+---@meta
+---
+--- C_NamePlate is a namespace for functions related to nameplates.
+---
+--- @class C_NamePlate
+C_NamePlate = {
+	--- @param unit string
+	--- @return Frame|nil
+	--- Returns the nameplate frame for a given unit.
+	GetNamePlateForUnit = function(unit) end,
+
+	--- @return table
+	--- Returns a table of all nameplates currently shown.
+	GetNamePlates = function() end,
+}