Add data-files and bundled templates/fonts/css to the package and
rename the executable to hakysidian (autogen Paths_hakysidian).
Refactor site.hs to parse CLI commands (build/clean/rebuild/watch),
start a preview server, snapshot inputs and run an incremental watch
loop, and move rules into a siteRules function. Update ChaoDoc and
filters to accept math-macros, and add favicon links to templates.
sxlxc