clock: Cleanup ReplicaId, Lamport and Global (#40600)

- Notable change is the use of a newtype for `ReplicaId`
- Fixes `WorktreeStore::create_remote_worktree` creating a remote
worktree with the local replica id, though this is not currently used
- Fixes observing the `Agent` (that is following the agent) causing
global clocks to allocate 65535 elements
- Shrinks the size of `Global` a bit. In a local or non-collab remote
session it won't ever allocate still.

Release Notes:

- N/A *or* Added/Fixed/Improved ...

crates/editor/src/display_map/inlay_map.rs

@@ -1278,7 +1278,7 @@ mod tests {
                 Anchor::min(),
                 &InlayHint {
                     label: InlayHintLabel::String("a".to_string()),
-                    position: text::Anchor::default(),
+                    position: text::Anchor::MIN,
                     padding_left: false,
                     padding_right: false,
                     tooltip: None,
@@ -1298,7 +1298,7 @@ mod tests {
                 Anchor::min(),
                 &InlayHint {
                     label: InlayHintLabel::String("a".to_string()),
-                    position: text::Anchor::default(),
+                    position: text::Anchor::MIN,
                     padding_left: true,
                     padding_right: true,
                     tooltip: None,
@@ -1318,7 +1318,7 @@ mod tests {
                 Anchor::min(),
                 &InlayHint {
                     label: InlayHintLabel::String(" a ".to_string()),
-                    position: text::Anchor::default(),
+                    position: text::Anchor::MIN,
                     padding_left: false,
                     padding_right: false,
                     tooltip: None,
@@ -1338,7 +1338,7 @@ mod tests {
                 Anchor::min(),
                 &InlayHint {
                     label: InlayHintLabel::String(" a ".to_string()),
-                    position: text::Anchor::default(),
+                    position: text::Anchor::MIN,
                     padding_left: true,
                     padding_right: true,
                     tooltip: None,
@@ -1361,7 +1361,7 @@ mod tests {
                 Anchor::min(),
                 &InlayHint {
                     label: InlayHintLabel::String("🎨".to_string()),
-                    position: text::Anchor::default(),
+                    position: text::Anchor::MIN,
                     padding_left: true,
                     padding_right: true,
                     tooltip: None,

crates/editor/src/editor.rs

@@ -82,7 +82,7 @@ use anyhow::{Context as _, Result, anyhow};
 use blink_manager::BlinkManager;
 use buffer_diff::DiffHunkStatus;
 use client::{Collaborator, ParticipantIndex, parse_zed_link};
-use clock::{AGENT_REPLICA_ID, ReplicaId};
+use clock::ReplicaId;
 use code_context_menus::{
     AvailableCodeAction, CodeActionContents, CodeActionsItem, CodeActionsMenu, CodeContextMenu,
     CompletionsMenu, ContextMenuOrigin,
@@ -1301,7 +1301,7 @@ enum SelectionHistoryMode {
 
 #[derive(Clone, PartialEq, Eq, Hash)]
 struct HoveredCursor {
-    replica_id: u16,
+    replica_id: ReplicaId,
     selection_id: usize,
 }
 
@@ -23482,7 +23482,7 @@ impl EditorSnapshot {
         self.buffer_snapshot()
             .selections_in_range(range, false)
             .filter_map(move |(replica_id, line_mode, cursor_shape, selection)| {
-                if replica_id == AGENT_REPLICA_ID {
+                if replica_id == ReplicaId::AGENT {
                     Some(RemoteSelection {
                         replica_id,
                         selection,