.pytool: Update CI Settings to support Emulator, ArmVirt, and Ovmf packages

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=2570

Update pytools configuration to enable EmulatorPkg, ArmVirtPkg,
and OvmfPkg.

Update documentation for the status of those packages.
Remove future work items that are now complete.

Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>

Reviewed-by: Shenglei Zhang <shenglei.zhang@intel.com>
Reviewed-by: Bret Barkelew <bret.barkelew@microsoft.com>

.pytool/Plugin/SpellCheck/cspell.base.yaml

@@ -164,5 +164,19 @@
         "Sdhci",
         "inmodule",
         "RISCV",
+        "edksetup",
+        "iscsi",
+        "nvdata",
+        "pytools",
+        "NTDDI",
+        "Wnonportable",
+        "CLANGPDB",
+        "nologo",
+        "lldmap",
+        "ASMLINK",
+        "NODEFAULTLIB",
+        "vcruntimed",
+        "ucrtd",
+        "msvcrtd",
     ]
 }