Split manuscript body into main.tex + sections/, move template to Template/ ...

main.tex is now the actual manuscript to edit and compile, copied from
the official MDPI template. Body content moves out into
sections/{introduction,related_work,method,experiment,discussion,
conclusion}.tex, \input from main.tex right after each \section heading;
figures/ added for images. Abstract stays inline in main.tex since
mdpi.cls reuses it verbatim as PDF pdfsubject metadata, which requires
full expandability that \input breaks.

The pristine template (template.tex/template.pdf) moves into its own
Template/ folder to stay visually distinct from the actual manuscript;
its \documentclass/\includegraphics calls are updated to ../Definitions/
accordingly. It's kept as read-only reference going forward.

Also removes the template's "How to Use this Template" placeholder
section and the unused optional Patents section, and documents the new
layout in CLAUDE.md.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>