Handle packwiz bootstrap installer already being present (#1595)

tests/setuponlytests/packwiz/web/index.toml

@@ -0,0 +1,6 @@
+hash-format = "sha256"
+
+[[files]]
+file = "mods/architectury-api.pw.toml"
+hash = "c20179449fff711afb96ba0eadd3328fbf1aae639082d25d77c9080837685b79"
+metafile = true

tests/setuponlytests/packwiz/web/mods/architectury-api.pw.toml

@@ -0,0 +1,13 @@
+name = "Architectury API"
+filename = "architectury-5.7.28-fabric.jar"
+side = "both"
+
+[download]
+url = "https://cdn.modrinth.com/data/lhGA9TYQ/versions/5.7.28+fabric/architectury-5.7.28-fabric.jar"
+hash-format = "sha1"
+hash = "aa38ae9cc2e978e4ec87ff891f7b02ea0c0ee1b8"
+
+[update]
+[update.modrinth]
+mod-id = "lhGA9TYQ"
+version = "Hf0Bau1j"

tests/setuponlytests/packwiz/web/pack.toml

@@ -0,0 +1,13 @@
+name = "Vanillia Server"
+author = "itzg"
+version = "2.0.0"
+pack-format = "packwiz:1.1.0"
+
+[index]
+file = "index.toml"
+hash-format = "sha256"
+hash = "1a27b406c3fb6d35167fe659384ab528a6b3f8a66e6c05d593058e646aec591f"
+
+[versions]
+fabric = "0.14.8"
+minecraft = "1.19"