Added Time Format conversion using lua script through filter in "Lua filter"

[fahadahammed]

The changes are mostly to show an example how to lua script does help to manipulate json data, in this case, change datetime format of a key.

[fahadahammed]

Example output:

Fluent Bit v3.1.4
* Copyright (C) 2015-2024 The Fluent Bit Authors
* Fluent Bit is a CNCF sub-project under the umbrella of Fluentd
* https://fluentbit.io

______ _                  _    ______ _ _           _____  __  
|  ___| |                | |   | ___ (_) |         |____ |/  | 
| |_  | |_   _  ___ _ __ | |_  | |_/ /_| |_  __   __   / /`| | 
|  _| | | | | |/ _ \ '_ \| __| | ___ \ | __| \ \ / /   \ \ | | 
| |   | | |_| |  __/ | | | |_  | |_/ / | |_   \ V /.___/ /_| |_
\_|   |_|\__,_|\___|_| |_|\__| \____/|_|\__|   \_/ \____(_)___/

[2024/08/01 00:56:25] [ info] [fluent bit] version=3.1.4, commit=, pid=78924
[2024/08/01 00:56:25] [ info] [storage] ver=1.5.2, type=memory, sync=normal, checksum=off, max_chunks_up=128
[2024/08/01 00:56:25] [ info] [cmetrics] version=0.9.1
[2024/08/01 00:56:25] [ info] [ctraces ] version=0.5.2
[2024/08/01 00:56:25] [ info] [input:dummy:dummy.0] initializing
[2024/08/01 00:56:25] [ info] [input:dummy:dummy.0] storage_strategy='memory' (memory only)
[2024/08/01 00:56:25] [ info] [input:dummy:dummy.1] initializing
[2024/08/01 00:56:25] [ info] [input:dummy:dummy.1] storage_strategy='memory' (memory only)
[2024/08/01 00:56:25] [ info] [sp] stream processor started
[2024/08/01 00:56:25] [ info] [output:stdout:stdout.0] worker #0 started
[0] event_category_a: [[1722452186.727104902, {}], {"event"=>"Restock", "pub_date"=>"2024-07-30T18:01:06Z"}]
[0] event_category_b: [[1722452186.730255842, {}], {"event"=>"Soldout", "pub_date"=>"2024-07-29T04:15:00Z"}]

[fahadahammed]

@patrick-stephens Please let me know if anything I need to add or modify to make it mergeable. Thanks.

[patrick-stephens]

Looks ok from a tech perspective to me but I'll let the tech writers team confirm the rest

[cnorris-cs]

I left comments and suggestions, but I've added my approval based on those to keep this moving.