docs: name uvx retrobios beside the one-liner

scripts/generate_readme.py

@@ -39,7 +39,7 @@ from common import (
 )
 from nativemode import check_label
 import release_record
-from siteguides import install_command
+from siteguides import PACKAGE_COMMAND, install_command
 from validate_pr import LARGE_FILE_ISSUE_URL
 from largefiles import load_registered_paths
 import pr_checks
@@ -633,6 +633,9 @@ def generate_readme(db: dict, platforms_dir: str, db_path: str = "database.json"
         "",
         "# Options in PowerShell: anything after | iex goes to iex, so the script runs as a block",
         install_command("powershell", "--check"),
+        "",
+        "# With Python 3.8 or newer: the same installer as a package (or pipx run retrobios)",
+        PACKAGE_COMMAND,
         "```",
         "",
         f"![{demo_description()}]({DEMO_GIF})",

scripts/generate_site.py

@@ -111,6 +111,7 @@ from siteguides import (
     INSTALL_BASE,
     INSTALL_PS1,
     INSTALL_SH,
+    PACKAGE_COMMAND,
     TERMINALS,
     TRUST_ITEMS,
     detected_systems as _detected_systems,
@@ -12013,6 +12014,13 @@ def generate_which_pack() -> str:
             *fence("powershell", install_command(
                 "powershell", "--platform retroarch --dest E:\\retroarch\\cores\\system")),
         ]),
+        *markup.details("note", "Have Python? Run it as a package", [
+            "The same installer, with Python 3.8 or newer:",
+            "",
+            *fence("sh", PACKAGE_COMMAND),
+            "",
+            "`pipx run retrobios` works too, or `pip install retrobios` and then `retrobios`.",
+        ]),
         *markup.details("note", "Copy the BIOS files from your old card", [
             "Plug the old card in and add `--from` with its folder. The BIOS files "
             "found there are copied, and the rest downloaded. The old card is only read.",

scripts/siteguides.py

@@ -384,6 +384,8 @@ INSTALL_BASE: str = _LOADED["install_base"]
 # The bootstraps the site serves (sitebootstrap.py writes them).
 INSTALL_SH: str = f"{INSTALL_BASE}/{SH_NAME}"
 INSTALL_PS1: str = f"{INSTALL_BASE}/{PS1_NAME}"
+# The same installer from PyPI (scripts/build_pypi.py builds the package).
+PACKAGE_COMMAND = "uvx retrobios"
 DEVICE_GROUPS: dict[str, tuple[str, str]] = _LOADED["device_groups"]
 GROUP_ANCHORS: dict[str, str] = _LOADED["group_anchors"]
 ALSO_RUNS: dict[str, tuple[tuple[str, str, str, str, str], ...]] = _LOADED["also_runs"]