Add configurable log level for cerr output

When directly running an executable which utilizes lg2, all logs are
shown by default. Currently, we can only disable them entirely without
any filtering o

Add configurable log level for cerr output

When directly running an executable which utilizes lg2, all logs are
shown by default. Currently, we can only disable them entirely without
any filtering options.

This commit adds the LG2_LOG_LEVEL environment variable for log
filtering. It allows runtime control of log verbosity by setting
LG2_LOG_LEVEL to desired maximum log level (0-7). Messages above this
level are filtered out. Defaults to 7 (all levels) if not set.

Tested:
Logs are properly filtered when the env variable is set

Change-Id: Ibe44d9971550d3b74ef818a00f7d6b364eb0212c
Signed-off-by: Piotr Sulewski <piotrx.sulewski@intel.com>

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lg2: Add path to list of supported types in docs

Update the documentation on the lg2 API to include std::filesystem::path
in the list of supported types.

Also updated a README.md that was failing C

lg2: Add path to list of supported types in docs

Update the documentation on the lg2 API to include std::filesystem::path
in the list of supported types.

Also updated a README.md that was failing CI due to a line that was too
long for the formatting checks.

Change-Id: I61a3694d6ad994155829d433a62b2f4a05980e3d
Signed-off-by: Shawn McCarney <shawnmm@us.ibm.com>

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lg2: update structured-logging with latest conversions

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I299eb37a617f8ba9cbeb94b63f817338a7e9a921

Address markdownlint warnings

Addressed markdownlint warnings reported by
"../openbmc-build-scripts/scripts/format-code.sh --enable markdownlint"

Tested: Verified and fixed warnings using
"../openb

Address markdownlint warnings

Addressed markdownlint warnings reported by
"../openbmc-build-scripts/scripts/format-code.sh --enable markdownlint"

Tested: Verified and fixed warnings using
"../openbmc-build-scripts/scripts/format-code.sh --enable markdownlint"

Change-Id: I6f8fe65373c748b907b9ca55c527800583983538
Signed-off-by: Jagpal Singh Gill <paligill@gmail.com>

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prettier: re-format

Prettier is enabled in openbmc-build-scripts on Markdown, JSON, and YAML
files to have consistent formatting for these file types. Re-run the
formatter on the whole repository.

prettier: re-format

Prettier is enabled in openbmc-build-scripts on Markdown, JSON, and YAML
files to have consistent formatting for these file types. Re-run the
formatter on the whole repository.

Change-Id: I6e8d56540a30898369d7f232d900fd74de2e7bd1
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>

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Enable lg2 log output to stderr in OpenBMC CI test

Similar to printing logs to stderr in a TTY, output to stderr can be
enabled during OpenBMC CI test by setting the `LG2_FORCE_STDERR`
environment v

Enable lg2 log output to stderr in OpenBMC CI test

Similar to printing logs to stderr in a TTY, output to stderr can be
enabled during OpenBMC CI test by setting the `LG2_FORCE_STDERR`
environment variable to any value.

Using meson, this can be done with something like:

test('test_name', executable(...), env: ['LG2_FORCE_STDERR=yes'])

Signed-off-by: Zane Shelley <zshelle@us.ibm.com>
Change-Id: I0323fbb75fe211148ec4dc7e263fe18aabb8ffc6

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lg2: reduce stdout and allow customization

It was reported by users that the information logged to the TTY was too
much in many cases, which limited the usability of lg2. Allow users to
customize t

lg2: reduce stdout and allow customization

It was reported by users that the information logged to the TTY was too
much in many cases, which limited the usability of lg2. Allow users to
customize the output by setting the "LG2_FORMAT" environment variable
and limit the default output to just "<level> message".

Tested:

Added a simple log to the beginning of an existing daemon and tested
format strings:

```
$ ./health-monitor
<6> Here I am!
$ LG2_FORMAT="{%l} %m %% [%f:%L:%F]|%" ./health-monitor
{6} Here I am! % [int main():511:../healthMonitor.cpp]|%
```

Resolves openbmc/phosphor-logging#26.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ie50c90f073539812c0693d05fc04ce7ad2b3fbcd

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lg2: support exception conversion

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I4b3cb55c9d03ed04b1f072bf3f5ef98ccffb0eef

lg2: support sdbusplus enum conversion

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I78cb28697631499adf5be64f7157a894c8d887ee

lg2: introduce motivation and API

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I519756bbbf84ce024b1a117013868c3c11ebdecb