powerlevel10k: the prompt as a pinned archive of the module's own, loaded from a slot

The distribution does not package the theme, and the predecessor cloned whatever
upstream's default branch held the day a hook ran (novox/hq ADR 0205). So upstream's
v1.20.0 release is vendored verbatim, with its licence, and shipped as an archive the
host unpacks under the account's home and checks by digest.

The prompt's configuration is today's ~/.p10k.zsh byte for byte, as a second archive.
Inline, its 86 KB would ride in every declaration and be unreviewable JSON. The zsh code
that loads both is a contribution to the normal slot (ADR 0204). Instant prompt stays off,
as it is today.

modules/powerlevel10k/theme/gitstatus/src/bits.h

@@ -0,0 +1,29 @@
+// Copyright 2019 Roman Perepelitsa.
+//
+// This file is part of GitStatus.
+//
+// GitStatus is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// GitStatus is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with GitStatus. If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef ROMKATV_GITSTATUS_BITS_H_
+#define ROMKATV_GITSTATUS_BITS_H_
+
+#include <cstddef>
+
+namespace gitstatus {
+
+inline size_t NextPow2(size_t n) { return n < 2 ? 1 : (~size_t{0} >> __builtin_clzll(n - 1)) + 1; }
+
+}  // namespace gitstatus
+
+#endif  // ROMKATV_GITSTATUS_BITS_H_