bake(dev): plugins in dev server, with other fixes (#15467)

Co-authored-by: paperdave <paperdave@users.noreply.github.com>
Co-authored-by: Jarred Sumner <jarred@jarredsumner.com>

src/sourcemap/sourcemap.zig

@@ -607,6 +607,9 @@ pub const ParseResult = union(enum) {
                 .location = Logger.Location{
                     .file = path,
                     .offset = this.loc.toUsize(),
+                    // TODO: populate correct line and column information
+                    .line = -1,
+                    .column = -1,
                 },
                 .text = this.msg,
             };