use zig package manager (#70)

.gitmodules

@@ -1,3 +0,0 @@
-[submodule "deps/microzig"]
-	path = deps/microzig
-	url = https://github.com/ZigEmbeddedGroup/microzig.git

build.zig

@@ -4,7 +4,7 @@ const Pkg = std.build.Pkg;
 const comptimePrint = std.fmt.comptimePrint;
 const FileSource = std.build.FileSource;
 
-pub const microzig = @import("deps/microzig/build.zig");
+const microzig = @import("microzig");
 
 pub const chips = @import("src/chips.zig");
 pub const boards = @import("src/boards.zig");

build.zig.zon

@@ -0,0 +1,11 @@
+.{
+    .name = "rp2040",
+    .version = "0.0.0",
+    .dependencies = .{
+        .microzig = .{
+            .url = "https://github.com/ZigEmbeddedGroup/microzig/archive/9392fe0f7bddde26155c181ab80b70097b49c791.tar.gz",
+            .hash = "1220326148075cd017425e04356329c33c3e794d31a54bdafa46521fcfcc55b422a3",
+        },
+    },
+}
+

deps/microzig

@@ -1 +0,0 @@
-Subproject commit 9392fe0f7bddde26155c181ab80b70097b49c791

src/boards.zig

@@ -1,5 +1,5 @@
 const std = @import("std");
-const microzig = @import("../deps/microzig/build.zig");
+const microzig = @import("microzig");
 const chips = @import("chips.zig");
 
 fn root_dir() []const u8 {

src/chips.zig

@@ -1,5 +1,5 @@
 const std = @import("std");
-const microzig = @import("../deps/microzig/build.zig");
+const microzig = @import("microzig");
 
 fn root_dir() []const u8 {
     return std.fs.path.dirname(@src().file) orelse ".";