library: client modules end in -client, like protocols end in -protocol

display-client and input-client (files and module names), so a service,
its wire contract, and its client never share a name: `display` the
service, `display-protocol` the contract, `display-client` a program's
view of it. The nine consumers' imports and their packages' declared
lists follow (regenerated from the source scan); build-support's
module_homes table carries the new names.

system/drivers/usb-hid/build.zig

@@ -10,8 +10,8 @@ pub fn build(b: *std.Build) void {
         .name = "usb-hid-keyboard",
         .root_source_file = b.path("keyboard.zig"),
         .imports = &.{
-            "driver", "input", "input-protocol", "ipc", "logging", "process", "service", "usb",
-            "usb-abi", "xkeyboard-config",
+            "driver", "input-client", "input-protocol", "ipc", "logging", "process", "service",
+            "usb", "usb-abi", "xkeyboard-config",
         },
     });
     b.installArtifact(usb_hid_keyboard_exe);
@@ -20,8 +20,8 @@ pub fn build(b: *std.Build) void {
         .name = "usb-hid-mouse",
         .root_source_file = b.path("mouse.zig"),
         .imports = &.{
-            "driver", "input", "input-protocol", "ipc", "logging", "process", "service", "usb",
-            "usb-abi",
+            "driver", "input-client", "input-protocol", "ipc", "logging", "process", "service",
+            "usb", "usb-abi",
         },
     });
     b.installArtifact(usb_hid_mouse_exe);

system/drivers/usb-hid/keyboard.zig

@@ -18,7 +18,7 @@ const std = @import("std");
 const ipc = @import("ipc");
 const process = @import("process");
 const service = @import("service");
-const input = @import("input");
+const input = @import("input-client");
 const device_manager = @import("driver");
 const logging = @import("logging");
 const usb = @import("usb");

system/drivers/usb-hid/mouse.zig

@@ -14,7 +14,7 @@ const std = @import("std");
 const ipc = @import("ipc");
 const process = @import("process");
 const service = @import("service");
-const input = @import("input");
+const input = @import("input-client");
 const device_manager = @import("driver");
 const logging = @import("logging");
 const usb = @import("usb");