remove MR module, keep only standard SCM modules

MR (Material Request) is specific to MatOne's multi-branch healthcare
model. Standard SCM replaces it with PR (Purchase Requisition) for
external procurement and Stock Transfer for internal moves.

- Delete mr-list.html, mr-create.html, mr-detail.html, mr-approval.html
- Remove MR links from sidebar in all existing files
- Remove MR rows from approval matrix, numbering profile, role matrix
- Remove MR links from index.html

ad-integrations.html

@@ -37,7 +37,6 @@
         <a href="./po-list.html" class="block rounded-r-lg py-1.5 pl-3 pr-2 text-xs text-white/65 hover:bg-white/10 hover:text-white">Purchase Order</a>
         <a href="./pr-list.html" class="block rounded-r-lg py-1.5 pl-3 pr-2 text-xs text-white/65 hover:bg-white/10 hover:text-white">Purchase Requisition</a>
         <a href="./po-matching.html" class="block rounded-r-lg py-1.5 pl-3 pr-2 text-xs text-white/65 hover:bg-white/10 hover:text-white">3-Way Matching</a>
-        <a href="./mr-list.html" class="block rounded-r-lg py-1.5 pl-3 pr-2 text-xs text-white/65 hover:bg-white/10 hover:text-white">Material Request</a>
       </div></div>
     <div><p class="rounded-lg px-3 py-1.5 font-semibold text-white/75 hover:bg-white/10 hover:text-white">Receiving</p><div class="ml-3 mt-0.5 space-y-0.5 border-l border-white/10">
         <a href="./rcv-list.html" class="block rounded-r-lg py-1.5 pl-3 pr-2 text-xs text-white/65 hover:bg-white/10 hover:text-white">Goods Receipt</a>