nvim: upgrade AstroNvim to v6 and add motion training plugins

fish: rename fzf abbreviations for consistency (ff → fo, fz → ff)

Add project CLAUDE.md and ignore .claude/ local state

Update light/dark theme to be Frappé/Macchiato

nvim: update lazy packages

docs: add README, LICENCE and assets

claude: introduces the claude config

cursor: introduces the cursor config

starship: add prompt config

nvim: add Neovim config and plugins

ghostty: add terminal config

fzf: add Catppuccin theme config

fish: add Fish shell config and integrations

eza: add config, themes, and theme switcher

clojure: add deps and tools config