Add the ability to edit remote directories over SSH (#14530)

This is a first step towards allowing you to edit remote projects
directly over SSH. We'll start with a pretty bare-bones feature set, and
incrementally add further features.

### Todo

Distribution
* [x] Build nightly releases of `zed-remote-server` binaries
    * [x] linux (arm + x86)
    * [x] mac (arm + x86)
* [x] Build stable + preview releases of `zed-remote-server`
* [x] download and cache remote server binaries as needed when opening
ssh project
* [x] ensure server has the latest version of the binary


Auth
* [x] allow specifying password at the command line
* [x] auth via ssh keys
* [x] UI password prompt

Features
* [x] upload remote server binary to server automatically
* [x] opening directories
* [x] tracking file system updates
* [x] opening, editing, saving buffers
* [ ] file operations (rename, delete, create)
* [ ] git diffs
* [ ] project search

Release Notes:

- N/A

---------

Co-authored-by: Piotr Osiewicz <24362066+osiewicz@users.noreply.github.com>

crates/remote_server/Cargo.toml

@@ -0,0 +1,51 @@
+[package]
+name = "remote_server"
+description = "Daemon used for remote editing"
+edition = "2021"
+version = "0.1.0"
+publish = false
+license = "GPL-3.0-or-later"
+
+[lints]
+workspace = true
+
+[lib]
+path = "src/remote_server.rs"
+doctest = false
+
+[[bin]]
+name = "remote_server"
+
+[features]
+default = []
+test-support = ["fs/test-support"]
+
+[dependencies]
+anyhow.workspace = true
+env_logger.workspace = true
+fs.workspace = true
+futures.workspace = true
+gpui.workspace = true
+log.workspace = true
+project.workspace = true
+remote.workspace = true
+rpc.workspace = true
+settings.workspace = true
+smol.workspace = true
+worktree.workspace = true
+
+[dev-dependencies]
+client = { workspace = true, features = ["test-support"] }
+clock = { workspace = true, features = ["test-support"] }
+fs = { workspace = true, features = ["test-support"] }
+gpui = { workspace = true, features = ["test-support"] }
+http = { workspace = true, features = ["test-support"] }
+language = { workspace = true, features = ["test-support"] }
+node_runtime = { workspace = true, features = ["test-support"] }
+remote = { workspace = true, features = ["test-support"] }
+
+serde_json.workspace = true
+
+[build-dependencies]
+cargo_toml.workspace = true
+toml.workspace = true