pkg fixes from https://github.com/ocaml/opam-repository/pull/28338 and dune fmt

bin/dune

···
 (executable
  (public_name mlgpx)
  (name mlgpx_cli)
- (libraries gpx gpx_eio cmdliner eio_main fmt fmt.tty fmt.cli))
+ (libraries gpx gpx_eio cmdliner eio_main fmt fmt.tty fmt.cli))

dune-project

···
 
 (package
  (name mlgpx)
- (depends ocaml dune xmlm ptime eio ppx_expect alcotest eio_main cmdliner fmt logs)
+ (depends ocaml dune xmlm ptime (eio (>= 1.2)) ppx_expect alcotest eio_main cmdliner fmt logs)
  (synopsis "Library and CLI for parsing and generating GPS Exchange (GPX) formats")
  (description
   "mlgpx is a streaming GPX (GPS Exchange Format) library for OCaml. It provides a portable core library using the xmlm streaming XML parser, with a separate Unix layer for file I/O operations. The library supports the complete GPX 1.1 specification including waypoints, routes, tracks, and metadata with strong type safety and validation.")

lib/gpx/dune

···
  (public_name mlgpx.core)
  (name gpx)
  (libraries xmlm ptime)
- (modules gpx parser writer validate coordinate link extension waypoint metadata route track error doc))
+ (modules
+  gpx
+  parser
+  writer
+  validate
+  coordinate
+  link
+  extension
+  waypoint
+  metadata
+  route
+  track
+  error
+  doc))

lib/gpx_eio/dune

···
  (public_name mlgpx.eio)
  (name gpx_eio)
  (libraries eio xmlm ptime gpx)
- (modules gpx_io gpx_eio))
+ (modules gpx_io gpx_eio))

lib/gpx_unix/dune

···
  (public_name mlgpx.unix)
  (name gpx_unix)
  (libraries unix xmlm ptime gpx)
- (modules gpx_io gpx_unix))
+ (modules gpx_io gpx_unix))

mlgpx.opam

···
   "dune" {>= "3.18"}
   "xmlm"
   "ptime"
-  "eio"
+  "eio" {>= "1.2"}
   "ppx_expect"
   "alcotest"
   "eio_main"
···
   ]
 ]
 x-maintenance-intent: ["(latest)"]
+dev-repo: "git+https://tangled.sh/@anil.recoil.org/ocaml-gpx"

mlgpx.opam.template

···
+dev-repo: "git+https://tangled.sh/@anil.recoil.org/ocaml-gpx"

test/dune

···
  (modules test_gpx))
 
 ;; ppx_expect inline tests
+
 (library
  (name test_corpus)
  (libraries gpx)
  (inline_tests)
- (preprocess (pps ppx_expect))
+ (preprocess
+  (pps ppx_expect))
  (modules test_corpus))
 
 ;; Alcotest suite for Unix and Eio comparison
+
 (executable
  (public_name corpus_test)
  (name test_corpus_unix_eio)
  (libraries gpx gpx_unix gpx_eio alcotest eio_main)
  (optional)
- (modules test_corpus_unix_eio))
+ (modules test_corpus_unix_eio))