feat: vcs: support Jujutsu as a diff-provider

Author: poliorcetics

Cargo.lock

@@ -31,10 +31,12 @@ assets = [
 ]
 
 [features]
-default = ["git"]
+default = ["git", "jj"]
 unicode-lines = ["helix-core/unicode-lines", "helix-view/unicode-lines"]
 integration = ["helix-event/integration_test"]
+# VCS features
 git = ["helix-vcs/git"]
+jj = ["helix-vcs/jj"]
 
 [[bin]]
 name = "hx"

helix-term/Cargo.toml

@@ -21,9 +21,12 @@ gix = { version = "0.73.0", features = ["attributes", "parallel", "status"], def
 imara-diff =  "0.2.0"
 anyhow = "1"
 log = "0.4"
+memchr = { version = "2.7", optional = true }
+tempfile = { version = "3.13", optional = true }
 
 [features]
 git = ["gix"]
+jj = ["memchr", "tempfile"]
 
 [dev-dependencies]
 tempfile.workspace = true