Add new language interfaces

Currently, the project only supports code generation in C. In order to support more languages, each language requires an implementation of [BaseLanguageInterface](https://github.com/kguzek/leetcode-project-generator/blob/main/src/lpg/interfaces/lang/base.py) in [interfaces/lang](https://github.com/kguzek/leetcode-project-generator/tree/main/src/lpg/interfaces/lang). Additionally, the interface will need to be registered in [interfaces/file.py](https://github.com/kguzek/leetcode-project-generator/blob/main/src/lpg/interfaces/file.py#L8) to be available for use via the CLI.

List of languages to be added:

- [x] python
- [x] python3 (thanks @dancikmad)
- [x] javascript
- [x] typescript
- [x] c
- [ ] cpp
- [ ] csharp
- [x] java
- [ ] php
- [ ] swift
- [ ] kotlin
- [ ] dart
- [x] golang (thanks @dancikmad)
- [ ] ruby
- [ ] scala
- [ ] rust
- [ ] racket
- [ ] erlang
- [ ] elixir

If you know any of the above languages and are willing to help, feel free to submit a PR and mention me to check it out!

> [!TIP]
> Be sure to use the provided unit test to verify your implementation handles various cases:
> ```sh
> python -m src.lpg.interfaces.lang_test
> ```

Start with src/lpg/interfaces/lang/base.py to understand BaseLanguageInterface, then inspect the existing implementations under src/lpg/interfaces/lang and registration in src/lpg/interfaces/file.py. Choose one unchecked language, register it for CLI use, and run python -m src.lpg.interfaces.lang_test to verify the implementation handles the provided cases.

Written by the indexing model from the issue text.