chore: update dune-project with correct metadata and dependencies

Co-authored-by: aider (openai//workspace/models/openai-mirror/gpt-oss-120b/) <aider@aider.chat>

Author: zenfey

dune-project

@@ -1,26 +1,24 @@
-(lang dune 3.21)
+(lang dune 3.1)
 
 (name dune-ai-context)
 
 (generate_opam_files true)
 
 (source
- (github username/reponame))
+ (github zenfey/dune-ai-context))
 
-(authors "Author Name <author@example.com>")
+(authors "ZFY <zf.yuan.y@gmail.com>")
 
-(maintainers "Maintainer Name <maintainer@example.com>")
+(maintainers "ZFY <zf.yuan.y@gmail.com>")
 
-(license LICENSE)
+(license "MIT")
 
-(documentation https://url/to/documentation)
+(documentation "https://github.com/zenfey/dune-ai-context")
 
 (package
  (name dune-ai-context)
- (synopsis "A short synopsis")
- (description "A longer description")
- (depends ocaml)
+ (synopsis "Tool to extract vendor library dependencies from Dune files and generate .mli interface files from their .cmi files.")
+ (description "dune-ai-context parses the external library dependencies of an OCaml project using `dune describe external-lib-deps`, filters out `ppx_` packages, locates the corresponding `.cmi` files in the OPAM switch, and writes their interface signatures to `vendor_interfaces/<library>.mli`. This provides a convenient context for AI‑assisted coding tools.")
+ (depends ocaml dune (>= 3.1) sexplib str unix compiler-libs.common)
  (tags
-  ("add topics" "to describe" your project)))
-
-; See the complete stanza docs at https://dune.readthedocs.io/en/stable/reference/dune-project/index.html
+  ("ocaml" "dune" "vendor" "cmi" "interface" "AI tool" "LLM")))