linux: re-add open fallback (#14359)

Release Notes:

- linux: Fixed opening urls/directories on systems where the xdg desktop
portal doesn't handle those requests.

Cargo.lock

@@ -4902,6 +4902,7 @@ dependencies = [
  "num_cpus",
  "objc",
  "oo7",
+ "open",
  "parking",
  "parking_lot",
  "pathfinder_geometry",
@@ -5713,6 +5714,25 @@ version = "2.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "28b29a3cd74f0f4598934efe3aeba42bae0eb4680554128851ebbecb02af14e6"
 
+[[package]]
+name = "is-docker"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "928bae27f42bc99b60d9ac7334e3a21d10ad8f1835a4e12ec3ec0464765ed1b3"
+dependencies = [
+ "once_cell",
+]
+
+[[package]]
+name = "is-wsl"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "173609498df190136aa7dea1a91db051746d339e18476eed5ca40521f02d7aa5"
+dependencies = [
+ "is-docker",
+ "once_cell",
+]
+
 [[package]]
 name = "isahc"
 version = "1.7.2"
@@ -7195,6 +7215,17 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
 
+[[package]]
+name = "open"
+version = "5.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61a877bf6abd716642a53ef1b89fb498923a4afca5c754f9050b4d081c05c4b3"
+dependencies = [
+ "is-wsl",
+ "libc",
+ "pathdiff",
+]
+
 [[package]]
 name = "open_ai"
 version = "0.1.0"