added plugin to convert relative datetime

added rag utility and tools

v0.0.55; a few tweaks

added cli options for searches

fixed openai client close connection issue

automate prompt engineering

added a few more tools

a few more tools

added tool `searxng`

added perplexica tools

uploaded v0.0.45

fixed ollama resource warning with custom client

Android tools are added

fixed some plugins and tools

updated readme