Refactor whole addon to follow best practices

Addon/Code/SpeechDataApi.lua

@@ -0,0 +1,23 @@
+local _, addon = ...
+
+local function FillPlaceholders(text)
+    if text == nil then
+        return text
+    end
+
+    local playerName = UnitName("player")
+
+    local formatted = text;
+    formatted = string.gsub(formatted, '<name>', playerName);
+    formatted = string.gsub(formatted, 'Champions', playerName);
+    formatted = string.gsub(formatted, 'champions', playerName);
+
+    return formatted
+end
+
+local function GetSpeech(message)
+    local speech = addon.data.speech[message];
+    local text = speech and speech.text or nil
+    return FillPlaceholders(text)
+end
+addon.API.GetSpeech = GetSpeech