Docs overhaul: quickstart, current commands everywhere, credits

Main README: clone/SSH/branching quickstart with full /das paths,
--tmpdir/--distdir as part of the standard build command (do not fill
/var/tmp or $HOME) with cleanup for defaults, tips deduplicated against
module READMEs, old-system references removed, resource links and
tutorial acknowledgements added.

Module READMEs: purge outdated recipes repo-wide — Pmodules/1.1.20 and
2.0.0 plus ./build replaced by modbuild/2.1.3 invocations; the cctbx
unbound-variable fix moved from the main README into phenix and DIALS
READMEs where it belongs.

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

autoPROC/README.md

@@ -10,11 +10,11 @@ dependencies.
 
 Step 1: make sure you are in the `unx-mx_adm` group -- no -adm account needed, members can update the modules in `/opt/psi/MX` directly (if you have problems, please let the admins know)
 
-Step 2: load the latest Pmodules package
+Step 2: load the build tool (modbuild)
 
 ```
 module use unstable
-module load Pmodules/2.0.0
+module load modbuild/2.1.3
 ```
 
 Step 3: stage the licence-gated snapshot. Download it from Global Phasing (needs
@@ -38,7 +38,7 @@ vi files/config.yaml
 Step 5: build (installs to `/opt/psi/MX/autoPROC/<date>`)
 
 ```
-./build 20240710
+modbuild build 20240710
 ```
 
 Step 6: confirm the module loads and autoPROC is licensed