Rename various [Runtime] options and rename mkosi qemu to mkosi vm

- Let's get rid of the "Qemu" prefix for runtime options as they apply
  both to the qemu and vmspawn verbs.
- Let's rename QemuGui= to Console= and make it take all the options
  that are accepted by vmspawn's --console= option.
- Let's rename the various runtime options to the corresponding vmspawn
  option where applicable.
- Let's rename mkosi qemu to mkosi vm as well while we're at it.

.github/workflows/ci.yml

@@ -178,7 +178,7 @@ jobs:
           Environment=SYSTEMD_REPART_MKFS_OPTIONS_EROFS="--quiet"
 
           [Runtime]
-          QemuKvm=yes
+          KVM=yes
           EOF
 
           # TODO: Remove once all distros have recent enough systemd that knows systemd.default_device_timeout_sec.

docs/distribution-policy.md

@@ -57,4 +57,4 @@ used:
   another existing distribution, update the `[Match]` blocks for the
   existing distribution to also match against the new distribution. To
   test whether all necessary changes were made, you can run
-  `mkosi -d <distribution> --tools-tree -t disk -f qemu`.
+  `mkosi -d <distribution> --tools-tree -t disk -f vm`.

mkosi.conf

@@ -50,4 +50,4 @@ KernelModulesInitrdExclude=.*
 KernelModulesInitrdInclude=default
 
 [Runtime]
-QemuMem=4G
+RAM=4G

mkosi.conf.d/15-memory.conf

@@ -6,4 +6,4 @@ Format=|uki
 Format=|cpio
 
 [Runtime]
-QemuMem=8G
+RAM=8G

mkosi/__init__.py

@@ -2623,7 +2623,7 @@ def check_tools(config: Config, verb: Verb) -> None:
     if verb == Verb.boot:
         check_systemd_tool(config, "systemd-nspawn", version="254", reason="boot images")
 
-    if verb == Verb.qemu and config.vmm == Vmm.vmspawn:
+    if verb in (Verb.vm, Verb.qemu) and config.vmm == Vmm.vmspawn:
         check_systemd_tool(config, "systemd-vmspawn", version="256", reason="boot images with vmspawn")
 
     if verb == Verb.sysupdate:
@@ -4809,6 +4809,7 @@ def run_verb(args: Args, images: Sequence[Config], *, resources: Path) -> None:
         {
             Verb.shell: run_shell,
             Verb.boot: run_shell,
+            Verb.vm: run_vm,
             Verb.qemu: run_vm,
             Verb.serve: run_serve,
             Verb.burn: run_burn,