docs(readme): localise to British English and improve formatting
- Replaced straight quotes with curly ones (Ewan’s Corner)
- Localised spelling to en-GB (e.g. “optimisation”, “licence”, “prioritised”)
- Improved markdown formatting with trailing spaces for consistent line breaks
- Updated feature list for clarity and added missing config options
- Expanded blog system documentation with prioritisation and RSS details
- Added minor consistency fixes across sections (hyphenation, grammar, tone)