feat: 添加基金监控系统基础功能

添加基金监控系统相关文件，包括邮件发送功能、基金数据配置、测试脚本等。主要包含以下内容：

1. 添加PHPMailer库及相关语言文件
2. 添加基金配置数据文件(fund_config.json, fund_names.json等)
3. 添加邮件发送测试脚本(test_email.php, test_fund_email.php等)
4. 添加.gitignore文件忽略不必要的文件
5. 添加composer.json配置依赖

Signed-off-by: LL <LL>

data/fund_config.json

@@ -0,0 +1,70 @@
+[
+    {
+        "channel": "1",
+        "fund_code": "003766",
+        "investment": 1000
+    },
+    {
+        "channel": "1",
+        "fund_code": "008327",
+        "investment": 1000
+    },
+    {
+        "channel": "1",
+        "fund_code": "012863",
+        "investment": 10000
+    },
+    {
+        "channel": "1",
+        "fund_code": "023350",
+        "investment": 1000
+    },
+    {
+        "channel": "1",
+        "fund_code": "017560",
+        "investment": 1000,
+        "name": "基金017560"
+    },
+    {
+        "channel": "2",
+        "fund_code": "011815",
+        "investment": 1000,
+        "name": "基金011815"
+    },
+    {
+        "channel": "2",
+        "fund_code": "003598",
+        "investment": 1000,
+        "name": "基金003598"
+    },
+    {
+        "channel": "2",
+        "fund_code": "004206",
+        "investment": 1000,
+        "name": "基金004206"
+    },
+    {
+        "channel": "2",
+        "fund_code": "022365",
+        "investment": 1000,
+        "name": "基金022365"
+    },
+    {
+        "channel": "2",
+        "fund_code": "022364",
+        "investment": 1000,
+        "name": "基金022364"
+    },
+    {
+        "channel": "2",
+        "fund_code": "011103",
+        "investment": 1000,
+        "name": "基金011103"
+    },
+    {
+        "channel": "0",
+        "fund_code": "025825",
+        "investment": 1000,
+        "name": "基金025825"
+    }
+]