Vendor gitpanel 0.3.0 (2.1.8-5)

Git panel integrated into the treeview pane: uncommitted changes with
diff stats, staging, commits and history, toggled from a git-branch
button in the treeview toolbar or the status bar. History is pinned to
the bottom half of the panel; commit patches open with diff syntax
highlighting from the already bundled language_diff.

Pinned to lite-xl-gitpanel @ 0731a63 (see debian/extra/README.source).

debian/extra/README.source

@@ -4,6 +4,11 @@ Vendored from upstream, pinned by commit:
     plugins/: gitstatus, gitopen, fontconfig, open_ext, select_colorscheme,
     smoothcaret, nerdicons, language_* (all 104; none overlap the ones bundled
     in the core data/ directory)
+- lite-xl-gitpanel  (own plugin, source tree lite-xl-gitpanel)  @ 0731a63 (main, 2026-09)
+    plugins/: gitpanel -- git panel integrated into the treeview pane
+    (changes, staging, commits, history) with a toolbar toggle button;
+    uses the bundled language_diff for commit diff highlighting
+
 - lite-xl-lsp       https://github.com/lite-xl/lite-xl-lsp       @ d1432ae (master, 2026-09)
     vendored whole as plugins/lsp/ (screenshots removed)
 - lite-xl-widgets   https://github.com/lite-xl/lite-xl-widgets   @ dcf1c8c