docs: update documentation formatting and descriptions

chore: rename default profile documentation to profiles/default directory

Fixing.

feat: combine prompt system documentation with namespace structure and best practices

docs: update documentation to reflect prompts and profiles stored in dokuwiki pages under 'dokullm:' namespace

docs: add documentation file

docs: update documentation for consistent prompt system and profile structure

docs: add documentation system overview

docs: add documentation for default profile and action table format

docs: add detailed documentation for prompt system hierarchy and placeholders

docs: add detailed LLM configuration and workflow documentation

docs: add detailed installation guide for DokuLLM plugin in DokuWiki syntax