feat: trying to remember every page of this splendid manual

docs/useful_sdm_pages.md

+# Useful pages of the Intel SDM
+
+## VMX Instruction Conventions
+
+- **Section 32.2 Vol.3C p.4207**
+
+![VMX instruction conventions](./figs/useful_sdm_pages/vmx_instruction_conventions.png) 
+
+## VM Instruction Error Numbers
+
+- **Section 32.4 Vol.3C p.4236**
+
+![VM-Instruction Error Numbers](./figs/useful_sdm_pages/vm_instruction_error_table.png)