feat: add python3 as a lazy installed tool

.github/workflows/pr-test.yml

@@ -73,6 +73,9 @@ jobs:
           test "npx works in interactive shell" \
             "$IN -i -c 'source ~/.bashrc 2>/dev/null; npx --version'"
 
+          test "python3 works in interactive shell" \
+            "$IN -i -c 'source ~/.bashrc 2>/dev/null; python3 --version'"
+
           test "gh works in interactive shell" \
             "$IN -i -c 'source ~/.bashrc 2>/dev/null; gh --version'"
 
@@ -92,6 +95,9 @@ jobs:
           test "npx works in non-interactive shell" \
             "$IN -c 'which npx && npx --version'"
 
+          test "python3 resolves from auto-install-shims" \
+            "$IN -c 'which python3 | grep -q /opt/auto-install-shims/python3 && python3 --version'"
+
           echo "=== mise use (non-interactive, via BASH_ENV fallback) ==="
 
           test "mise use go works in non-interactive shell" \

mise-config.toml

@@ -9,7 +9,7 @@
 "vim" = "latest"
 "github:zyedidia/micro" = "latest"
 "zerobrew:nano" = "latest"
-"python" = "latest"
+"python" = "latest"                 # shim:python,python3
 "node" = "latest"
 "npm" = "latest"              # shim:npm,npx
 "github:facebook/sapling" = "latest"    # shim:sl