Move license.txt to the root of the project folder - #730

…oject#466) (amule-project#730)

The Shared Files view only had static counters, so an actively seeded file
looked the same as an idle one. Surface the four fields 5722207 added to
GET /shared (list and detail alike).

Table (shared.js):
  * New columns: "Up speed" (upload_speed_bps) and "Uploading" (uploading),
    both live off the existing SSE shared channel, plus "Last upload" and
    "Shared since" hidden by default -- the timestamps are wide and rarely
    watched, one click away in the column picker.
  * The totals line now sums the upload speed, mirroring the downloads view.

Detail panel (shared-detail.js): the same four values as rows in the
Sharing section, with tooltips. The existing queued-clients row is left
alone so "uploading" and "queued" read as two neighbouring rows.

format.js: fmtTs, until now local to download-detail.js, becomes the
exported formatTimestamp and is reused by both panels. Unknown timestamps
(0 -- never uploaded, or a known.met entry written before the feature)
render as a dash.

i18n: new keys in en.json and es.json.

…r.cpp (amule-project#675) (amule-project#725)

* chore(gui): delete unreachable bitmap functions/entries from muuli_wdr.cpp

First slice of the icon-system cleanup scoped in amule-project#675: remove code with
zero call sites anywhere in the tree, before any wxArtProvider migration
work starts.

- muleToolbar(): whole function unused -- superseded by the main
  wxToolBar setup in amuleDlg.cpp; nothing calls it.
- moreImages(): whole function unused, both of its two icon entries.
- amuleDlgImages(): 21 of 35 index blocks have no caller anywhere
  (0-13, 16, 17, 19, 27, 28, 31, 34). The 14 live ones are untouched --
  10 of those (20-26, 29, 32, 33) are already the fallback path inside
  amuleDlg.cpp's Add_Skin_Icon, which prefers a wxArtProvider/SVG lookup
  first; the other 4 (14, 15, 18, 30) are still called directly.
- amuleSpecial(): 6 of 26 index blocks have no caller (6, 7, 8, 9, 18,
  20) -- checked both direct call sites and the PrefsUnifiedDlg.cpp
  fallback table (pages[].m_imageidx), which uses neither.

convert_xpm in PartFileConvertDlg.cpp was on the same "no literal
grep hits" list initially but is not actually dead -- SetIcon(wxICON
(convert)) reaches it via the wxICON macro's token-pasting
(X##_xpm), invisible to a plain identifier search. Caught by a full
build failing on the undeclared identifier, not by inspection; left
untouched.

Deletes 1373 lines (~16% of the file). No behavior change: every
touched entry was unreachable code. clang-format v18 clean; full
amule build verified (macOS, CLIENT_GUI unaffected since neither
touched symbol is CLIENT_GUI-only).

* chore(po): regenerate catalogs after muuli_wdr.cpp dead-code removal

muleToolbar() duplicated several msgid source-location references
(Networks, Searches, Downloads Window, etc.) already present via
amuleDlg.cpp's own toolbar setup. Deleting it drops those now-stale
#: comments; no msgid added, removed, or retranslated -- verified via
unchanged msgid count (1903 before/after) and a diff limited to
source-location comments and POT-Creation-Date.

Regenerated after rebasing onto upstream/master to pick up po/
changes from amule-project#723/amule-project#724/amule-project#726/amule-project#728/amule-project#730/amule-project#731, which had drifted our
prior regeneration out of sync.