Bump the pinned ICU version from 78.2 to 78.3 — the current release — so
the build works on systems that already ship 78.3. And bump our vcpkg
baseline — because 78.3 is newer than our existing baseline. And pin
freetype to 2.13.3 — because the baseline update otherwise pulls in
2.14.3, which has font-rendering changes that break our layout tests.
Fixes https://github.com/LadybirdBrowser/ladybird/issues/10145
Use libedit's readline-compatible interface for the JavaScript REPL so
line editing, history, and tab completion no longer depend on LibLine.
The REPL keeps its existing multiline input and completion behavior,
but no longer provides LibLine's live syntax highlighting.
Remove the unused LibLine dependency from the wasm utility and delete
the LibLine library from the build now that it has no remaining
consumers.
Our Flatpak builds currently start failing once a commit ID no longer
matches with the commit pointed to by the configured `branch`. This is
becoming pretty annoying for Skia, since the `chrome/mXYZ` branches are
effectively moving targets.
Change the `branch` key in the Flatpak config to `x-branch`, which
removes the constraint and allows Flatpak to work with just the pinned
commit IDs. Change the linter to still use `x-branch` as the reference
to compare with our vcpkg configuration, so we make sure to still keep
things consistent between vcpkg and Flatpak.
