Before this change if you had a matching binding and a pending key,
the matching binding happened unconditionally.

Now we will wait a second before triggering that binding to give you
time to complete the action.

Also add several `TODO!(docs)` comments to places that need more
feedback.

Release Notes:

- N/A

<img width="447" alt="SCR-20240121-ofhg"
src="https://github.com/zed-industries/zed/assets/19867440/7fe13a74-45c7-43ec-a5e8-5127bc285b32">

In this screenshot, the first two messages were sent back-to-back, but
the third message was sent nearly two hours later. Coalescing the
messages doesn't feel right after a certain period of time, as it gives
misleading timestamps on messages. Discord has this feature, but I'm not
sure what the value they use is. I've set the threshold to 5 minutes for
now.

<img width="480" alt="SCR-20240121-oghs"
src="https://github.com/zed-industries/zed/assets/19867440/ee1cfe36-7c13-4072-9f66-93e2de6542f1">

Release Notes:

- Improved the grouping of chat messages from same user. Grouping now
only occurs if the user sends multiple messages, in succession, within a
specified duration of time.

A user was not seeing the "yesterday" text in their chat timestamps for
messages right before the midnight boundary

Release Notes:

- Fixed bugs in formatting of chat timestamps

This matches Neovim behaviour by setting the mode to `Normal` when using
search while in visual mode.

Release Notes:

- Fixed Vim mode not switching to normal mode from visual mode when
using search (`/`) while in visual mode.

This doesn't cover everything that should be tested in telemetry, but it
is a start. I'll add more over time.

Release Notes:

- N/A

That took a while.

I also removed an instance of SmallVec leaking into the public GPUI
APIs.

Release Notes:

- N/A

Remove SmallVec from the public API of GPUI

Release Notes:

- Channels: Improved font sizes in chat
- Channels: Added a link preview when hovering over links in chat
- Channels: Fixed rendering of newlines in chat messages
- Added a new setting "use_autoclose" (defaulting to true) that lets you
disable autoclose per language.
([#1420](https://github.com/zed-industries/community/issues/1420))
([#1903](https://github.com/zed-industries/community/issues/1903))

In the process I also:
- Made the AsyncWindowContext slightly more ergonomic.
- Refactored the input handler traits to enable easy, non-view input
handlers
- Locked down the visibility on all mac-specific GPUI code
- Documented all remaining, public types

Release Notes:

- N/A

Add documentation to all platform types

Also disable autoclose for Chat

This matches Neovim behaviour by setting the mode to `Normal` when using
search while in visual mode.

Co-authored-by: Conrad <conrad@zed.dev>

Automatically record the context on non-view input handlers
Simplify the async window context update() method

Release Notes:

- Added autocomplete for @-mentions in the chat panel.

This PR prevents the breadcrumbs from overflowing the toolbar when its
contents are long:

<img width="1270" alt="Screenshot 2024-01-19 at 6 15 58 PM"
src="https://github.com/zed-industries/zed/assets/1486634/ecee7a42-51ef-43d4-99a1-9c3da784dede">

Release Notes:

- Fixed an issue where long breadcrumbs would overflow the toolbar.

Release Notes:

- Fixes a bug where open popovers would stay over top of zoomed panels,
if already open when the panel is zoomed.
- Fixes a bug where the terminal would create a selection when clicking
the status bar or title bar.