massive update wiki
Document sign_write/sign_read, entities, rs_pulse, realtime, and the Memory Card item
added inventory management wiki
Updated Examples (markdown)
Updated Errors and Gotchas (markdown)
Updated Standard Library (markdown)
Updated Execution Model (markdown)
Updated Language Guide (markdown)
Updated Quickstart (markdown)
Updated Home (markdown)
Updated _Sidebar (markdown)
Rename landing page back to Home.md GitHub wikis only treat a page literally named 'Home' as the default landing page. Renaming it to 'PotScript Wiki' broke that, so every other page's back-link and the sidebar's top link stopped resolving to a real landing page. Restore the Home slug and its H1 heading.
Restore _Sidebar.md
Destroyed _Sidebar (markdown)
Split docs into separate wiki pages with nav sidebar Replace the single-page stub Home.md with a proper landing page and split the PotScript reference into Quickstart, Language Guide, Execution Model, Standard Library, Errors & Gotchas, and Examples.
Initial Home page