This commit adds the initial navigation data type and tools
which will lay the foundation to share and process navigation
data between the application and navigation systems like GNSS
and similar triangulation technologies.

Signed-off-by: Bjarki Arge Andreasen <bjarkix123@gmail.com>

This commit adds the public header for the GNSS API, along
with the initial GNSS Kconfig file and an entry in the
common linker file for registered GNSS data callbacks.

A very naive implementation of the GNSS data callback is
provided as well in drivers/gnss/gnss_publish.c

Signed-off-by: Bjarki Arge Andreasen <bjarkix123@gmail.com>

This commit adds a library which dumps the contents of the
gnss structures gnss_info, navigation_data, gnss_time and
gnss_satellite as a string.

Signed-off-by: Bjarki Arge Andreasen <bjarkix123@gmail.com>

This commit adds dumping of GNSS data and satellites to
the log if CONFIG_GNSS_DUMP_TO_LOG is selected

Signed-off-by: Bjarki Arge Andreasen <bjarkix123@gmail.com>

This commit adds parsing utilites for common string
representations of values contained in GNSS messages.

These utilites both parse and validate the integrity of
the data.

Unit tests are also added to validate the parsing
utilities.

Signed-off-by: Bjarki Arge Andreasen <bjarkix123@gmail.com>

This commit adds utilites to parse the RMC and GGA
NMEA0183 messages, which contain all data which shall be
published using the struct gnss_data.

It also adds a test suite for the added utilities.

Signed-off-by: Bjarki Arge Andreasen <bjarkix123@gmail.com>

This commit adds generic matches and handlers for the RMC,
GGA and GSV messages to be implemented as part of all
NMEA0183 based GNSS modems.

NMEA0183 based GNSS modems must place the
struct gnss_nmea0183_match_data struct as the first struct
in their data struct. Their data struct shall then be set
as the user_data for the modem_chat instance.

Lastly, the gnss_nmea0183_match callbacks must be included
in the unsolicited matches for the modem_chat instance.

The GNSS modems will initialize the NMEA0183 match instance
using gnss_nmea0183_match_init.

Signed-off-by: Bjarki Arge Andreasen <bjarkix123@gmail.com>

This commit adds a GNSS driver for the Quectel LCX6G
series of GNSS modems (LC26G, LC76G, LC86G). It is
based on the modem subsystem, and the GNSS utilities
added in the two previous commits.

Signed-off-by: Bjarki Arge Andreasen <bjarkix123@gmail.com>

This commit adds a sample which configures a GNSS modem
to enable all available systems, registers callbacks to
the GNSS data and satellites callbacks, and prints the
GNSS data and satellites from the callbacks when invoked
using printk.

Signed-off-by: Bjarki Arge Andreasen <bjarkix123@gmail.com>

- Added GNSS documentation entry to peripherals
- Added GNSS API entry to the API overview as 3.6 experimental

Signed-off-by: Bjarki Arge Andreasen <bjarkix123@gmail.com>