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>

.github/workflows/ci.yml

@@ -251,6 +251,8 @@ jobs:
           draft: true
           prerelease: ${{ env.RELEASE_CHANNEL == 'preview' }}
           files: |
+            target/zed-remote-server-mac-x86_64.gz
+            target/zed-remote-server-mac-aarch64.gz
             target/aarch64-apple-darwin/release/Zed-aarch64.dmg
             target/x86_64-apple-darwin/release/Zed-x86_64.dmg
             target/release/Zed.dmg
@@ -322,7 +324,9 @@ jobs:
         with:
           draft: true
           prerelease: ${{ env.RELEASE_CHANNEL == 'preview' }}
-          files: target/release/zed-linux-x86_64.tar.gz
+          files: |
+            target/zed-remote-server-linux-x86_64.gz
+            target/release/zed-linux-x86_64.tar.gz
           body: ""
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -405,7 +409,9 @@ jobs:
         with:
           draft: true
           prerelease: ${{ env.RELEASE_CHANNEL == 'preview' }}
-          files: target/release/zed-linux-aarch64.tar.gz
+          files: |
+            target/zed-remote-server-linux-aarch64.gz
+            target/release/zed-linux-aarch64.tar.gz
           body: ""
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}