Add support language pythondata for 30 Days of Pandas problem set

[cyinc]

🚀 Feature Proposal

Using the default language python3 to pull Pandas problem (e.g. LeetCode 1148) will get error:

[ERROR] Not supported language "python3"
[WARN] Supported languages:  mssql   mysql   oraclesql   postgresql   pythondata 
(node:2829) Warning: Accessing non-existent property 'padLevels' of module exports inside circular dependency

Motivation

To support Pandas problem set

Contribution

Potential solution:

1. Step 1. Update package.json to support pythondata as default language type in configuration key leetcode.defaultLanguage:

   vscode-leetcode/package.json

   Line 302 in 586b3e4

   "leetcode.defaultLanguage": {

   • Similar to PR fix: add rust in default language list #412 :
2. Step 2. Anything else? e.g. problem template, submit process, request template?