Multi password, custom word lists and more

Added:

New Env Variables/features:
- Disable language dropdown menu with env PP_HIDE_LANG=true
- You can now fetch custom word lists and set them in `PP_LANGUAGE_CUSTOM='https://example.com/test.txt'
- LANGUAGE needs to be set to custom to use this as env var
- Files need to end to .txt
- Files must contain word list separated by lines
- For example: https://github.com/jocxfin/pwgen/raw/main/wordlist.txt
  - Good sources for word lists:
  - https://github.com/kkrypt0nn/wordlists
  - https://github.com/xajkep/wordlists
- Enable possibility to create 5 passwords/passphrases at a time with MULTI_GEN=true
- Only made possible to change this via env variable for now, because it's slowing down the generation time
- More changes coming to this in the near future
- 100 times faster in offline mode, but compromises security.

Changes:

Code Organization: Improved project structure by modularizing the codebase, ensuring easier maintenance and scalability.
Changed the copying function to be more reliable with fallback
Better English in api info text

To use:

docker pull jocxfin/pwgen:latest
docker run -d -p 5069:5069 jocxfin/pwgen:latest

Offline mode:

docker pull jocxfin/pwgen:latest
docker run -d -e NO_API_CHECK=true -p 5069:5069 jocxfin/pwgen:latest

With environmental variables defining settings:

docker pull jocxfin/pwgen:latest
docker run -d -p 5069:5069 \\
  -e NO_API_CHECK=false \\
  -e PW_LENGTH=12 \\
  -e PW_INCLUDE_UPPERCASE=false \\
  -e PW_INCLUDE_DIGITS=false \\
  -e PW_INCLUDE_SPECIAL=false \\
  -e PW_EXCLUDE_HOMOGLYPHS=true \\
  -e PP_WORD_COUNT=4 \\
  -e PP_CAPITALIZE=false \\
  -e PP_SEPARATOR_TYPE=space \\
  -e PP_USER_DEFINED_SEPARATOR='' \\
  -e PP_MAX_WORD_LENGTH=12 \\
  -e PP_INCLUDE_NUMBERS=false \\
  -e PP_INCLUDE_SPECIAL_CHARS=false \\
  -e PP_LANGUAGE=en \\
  -e PP_HIDE_LANG=false \\
  -e PP_LANGUAGE_CUSTOM='' \\
  -e MULTI_GEN=true \\
  jocxfin/pwgen:latest

Quick and straightforward improvements for a better tool.

Resolves #34

jocxfin / pwgen

Multi password, custom word lists and more #60