docs: add unmark-web to Ecosystem (#77) (#86)

* docs: add watermarks-remover-web to Ecosystem (#77)

* docs: note AVIF and HEIC in the watermarks-remover-web entry

The client now ports the ISOBMFF paths from image_meta.py as well, so the
entry's format list was out of date.

* docs: rename the web UI entry to unmark-web and keep it higher-level

Renames the project per the maintainer's request, and drops the
references to internal module names, the client's proxy script and the
format list, which were the parts most likely to drift.

---------

Co-authored-by: Guillaume Meyer (The Opinionated Man) <1385518+guillaumemeyer@users.noreply.github.com>

README.md

@@ -660,6 +660,10 @@ Third-party projects that wrap or complement this repository, listed for discove
 
 [MetaClean](https://github.com/Moresyl/metaclean) is an independent MIT-licensed Rust/Tauri desktop application (Windows, macOS, Linux) providing a packaged native GUI for drag-and-drop metadata cleaning, with a system tray and Explorer integration. It is a separate codebase: it does not call this repository's Python service, and its supported formats and cleaning guarantees differ from this project's. See its README for details.
 
+### unmark-web — browser web UI
+
+[unmark-web](https://github.com/ivanusto/unmark-web) is an independent, MIT-licensed static web client. It removes invisible Unicode marks from text and strips provenance metadata from images entirely in the browser, and can optionally call this repository's HTTP service for the formats it does not handle locally. It is a separate codebase and is not affiliated with this project; see its README for scope and limits.
+
 ### Adding a project
 
 To register a project here, open a PR adding a short entry — project name, what it wraps or adds, and a link to its own repository. Keep entries brief and factual; do not claim compatibility with, or endorsement by, this project.