clang-format: copy latest and re-format

clang-format-16 has some backwards incompatible changes that require
additional settings for best compatibility and re-running the formatter.
Copy the latest

clang-format: copy latest and re-format

clang-format-16 has some backwards incompatible changes that require
additional settings for best compatibility and re-running the formatter.
Copy the latest .clang-format from the docs repository and reformat the
repository.

Change-Id: I84a952aae0e96b2960d8622659902df660d5ddb8
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>

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example/delayed_echo: Fix bogus compiler warning

An std::array size may be uninitialized? ok...
```
../example/delayed_echo.cpp: In lambda function:
../example/delayed_echo.cpp:46:29: error: ‘buffer

example/delayed_echo: Fix bogus compiler warning

An std::array size may be uninitialized? ok...
```
../example/delayed_echo.cpp: In lambda function:
../example/delayed_echo.cpp:46:29: error: ‘buffer’ may be used uninitialized [-Werror=maybe-uninitialized]
46 | ssize_t bytes = read(fd, buffer.data(), std::size(buffer));
| ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/array:41,
from ../example/delayed_echo.cpp:6:
/usr/include/c++/11/bits/range_access.h:245:5: note: by argument 1 of type ‘const std::array<char, 4096>&’ to ‘constexpr decltype (__cont.size()) std::size(const _Container&) [with _Container = std::array<char, 4096>]’ declared here
245 | size(const _Container& __cont) noexcept(noexcept(__cont.size()))
| ^~~~
../example/delayed_echo.cpp:45:32: note: ‘buffer’ declared here
45 | std::array<char, 4096> buffer;
```

Change-Id: I534dcfe5c4e2b843a061066548d8a4f9e6f9cc6f
Signed-off-by: William A. Kennington III <wak@google.com>

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utility/timer: Implement oneshot timers

This change is meant to enable users of the old openbmc timer class to
trivially use the timer if they only want single executions. It also
makes setting up t

utility/timer: Implement oneshot timers

This change is meant to enable users of the old openbmc timer class to
trivially use the timer if they only want single executions. It also
makes setting up the timer less verbose if you do not already know the
timeout interval.

Tested:
Run through unit tests and did a sample integration with
phosphor-watchdog and phosphor-networkd. Verified that the new
oneshot example works as expected.

Change-Id: I2cd006d1f19fff99bce3f732a16eac9ca9553666
Signed-off-by: William A. Kennington III <wak@google.com>

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