Supermaven (#10788)

Adds a supermaven provider for completions. There are various other
refactors amidst this branch, primarily to make copilot no longer a
dependency of project as well as show LSP Logs for global LSPs like
copilot properly.

This feature is not enabled by default. We're going to seek to refine it
in the coming weeks.

Release Notes:

- N/A

---------

Co-authored-by: Antonio Scandurra <me@as-cii.com>
Co-authored-by: Nathan Sobo <nathan@zed.dev>
Co-authored-by: Max <max@zed.dev>
Co-authored-by: Max Brunsfeld <maxbrunsfeld@gmail.com>

crates/zed/Cargo.toml

@@ -35,7 +35,6 @@ collab_ui.workspace = true
 collections.workspace = true
 command_palette.workspace = true
 copilot.workspace = true
-copilot_ui.workspace = true
 db.workspace = true
 diagnostics.workspace = true
 editor.workspace = true
@@ -51,6 +50,7 @@ go_to_line.workspace = true
 gpui.workspace = true
 headless.workspace = true
 image_viewer.workspace = true
+inline_completion_button.workspace = true
 install_cli.workspace = true
 isahc.workspace = true
 journal.workspace = true
@@ -83,6 +83,7 @@ settings.workspace = true
 simplelog = "0.9"
 smol.workspace = true
 tab_switcher.workspace = true
+supermaven.workspace = true
 task.workspace = true
 tasks_ui.workspace = true
 telemetry_events.workspace = true