New package: fcitx5-lotus-3.4.0

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Testing: Built and tested on glibc x86_64.

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Sorry for the mess and noise in the commit history earlier! I've cleaned it all up into a single commit containing only fcitx5-lotus. Thank you for your patience!

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Package description:
fcitx5-lotus is a Vietnamese input method for fcitx5, focusing on a non-preedit (direct typing) experience.

Technical notes:
-The package creates a '_uinput_proxy' system user. This is because the engine uses a background daemon to access '/dev/uinput' for simulating keyboard events (to achieve the 'non-preedit' typing). This follows the principle of least privilege, running the daemon under a dedicated user instead of root.
-The flag '-DINSTALL_RUNIT=ON' is used to install the runit service scripts required for Void Linux.
-Both 'acl' and 'acl-progs' are included in depends. The udev rule (99-lotus.rules) and the runit script use 'setfacl' (provided by 'acl-progs' on Void) to grant the '_uinput_proxy' user access to '/dev/uinput' at runtime. 'acl' is retained as a direct dependency because the daemon binary itself links against 'libacl' (hence 'acl-devel' in makedepends).
-'python3' is listed in hostmakedepends because the build system uses it at configure time (find_package(Python3)) and at install time (byte-compiling the settings GUI Python files).
-Upstream uses the generic username 'uinput_proxy' in its runit service and udev rules. Since Void Linux convention requires system users to have an underscore prefix, 'post_patch()' is used to sed-replace 'uinput_proxy' with '_uinput_proxy' in 'misc/fcitx5-lotus.runit' and 'misc/99-lotus.rules' before build (The 'post_patch()' sed-replacement is a temporary workaround.).
-Systemd service file and sysusers.d config are removed in 'post_install()' as they are not needed on Void.
-The settings GUI is split into a subpackage 'fcitx5-lotus-settings' to avoid pulling Python/Qt dependencies into the main package, since headless or terminal-only users may not need the GUI.
-bamboo-core is fetched as a separate distfile (Git submodule) and placed into the source tree via 'post_extract()'.
-bamboo-core is written in Golang, which is why 'go' is listed in hostmakedepends. The build process compiles bamboo-core from source before building fcitx5-lotus itself.
-The package also installs 'module-fcitx5-lotus.conf' to '/usr/lib/modules-load.d/' to automatically load the 'uinput' kernel module.

Notes from the Packager:
-If this package is merged, I plan to submit a request to upstream to make the proxy username configurable (e.g. via a CMake variable like 'UINPUT_PROXY_USER'), so that the 'post_patch()' workaround will no longer be necessary.
-Due to hardware limitations (old laptop), I could not test on musl or other architectures like aarch64. I would appreciate it if reviewers could help test these.

[Bnyro]

The emails must be real emails, not noreply emails.

[Bnyro]

Adding hicolor-icon-theme here is wrong. The package works completely fine without using the icons, so there's no reason to add that dependency.

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Thanks for the review! I've updated the PR according to your feedback:

• Updated the maintainer email to a valid email address.
• Removed hicolor-icon-theme from depends.