[#24602] Unify filter aliases and fix help output for readers

[Danipiza]

Summary

This PR updates the fastddsspy filter command so f, filter, and filters all use the same implementation, instead of treating filters as a special-case display/clear command.

It also fixes the help output so the readers command is shown correctly.

Changes

• unify filter command handling for f, filter, and filters
• update help output to use filters as the documented command prefix
• fix the readers entry in the help command output
• update application tests for the new help text and filter alias behavior

Insert a command for Fast DDS Spy:
>> h
Fast DDS Spy is an interactive CLI that allow to instrospect DDS networks.
Each command shows data related with the network in Yaml format.
Commands available and the information they show:
	help                                        : this help.
	version                                     : tool version.
	quit                                        : exit interactive CLI and close program.
	participants                                : DomainParticipants discovered in the network.
	participants verbose                        : verbose information about DomainParticipants discovered in the network.
	participants <Guid>                         : verbose information related with a specific DomainParticipant.
	writers                                     : DataWriters discovered in the network.
	writers verbose                             : verbose information about DataWriters discovered in the network.
	writers <Guid>                              : verbose information related with a specific DataWriter.

### Changed `reader` to `readers` 
	readers                                     : DataReaders discovered in the network.
	readers verbose                             : verbose information about DataReaders discovered in the network.
	readers <Guid>                              : verbose information related with a specific DataReader.
###
	topics                                      : Topics discovered in the network in compact format.
	topics v                                    : Topics discovered in the network.
	topics vv                                   : verbose information about Topics discovered in the network.
	topics <name>                               : Topics discovered in the network filtered by name (wildcard allowed (*)).
	topics <name> idl                           : Display the IDL type definition for topics matching <name> (wildcards allowed).
	topics <name> keys                          : Display the keys for topics matching <name> (wildcards allowed).
	topics <name> keys v                        : verbose information about keys discovered in the network.
	filters                                     : Display the active filters.
	filters clear                               : Clear all the filter lists.

### Changed `filter` to `filters` 
	filters clear <category>                    : Clear <category> filter list.
	filters add partitions <filter_str>         : Add <filter_str> in partitions filter list.
	filters remove partitions <filter_str>      : Remove <filter_str> in partitions filter list.
	filters set topic <topic_name> <filter_str> : Set topic filter list with <filter_str> as first value.
###
	echo <name>                                 : data of a specific Topic (Data Type must be discovered).
	echo <wildcard_name>                        : data of Topics matching the wildcard name (and whose Data Type is discovered).
	echo <name> verbose                         : data with additional source info of a specific Topic.
	echo <wildcard_name> verbose                : data with additional source info of Topics matching the topic name (wildcard allowed (*)).
	echo all                                    : verbose data of all topics (only those whose Data Type is discovered).

Notes and comments:
	To exit from data printing, press enter.
	Each command is accessible by using its first letter (h/v/q/p/w/r/t/s/f).

For more information about these commands and formats, please refer to the documentation:
https://fast-dds-spy.readthedocs.io/en/latest/

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 57.45%. Comparing base (faaa92a) to head (5be6f36).

Files with missing lines	Patch %	Lines
fastddsspy_tool/src/cpp/tool/Controller.cpp	80.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #151      +/-   ##
==========================================
- Coverage   62.12%   57.45%   -4.67%     
==========================================
  Files          29       28       -1     
  Lines        2508     1932     -576     
  Branches     1072      768     -304     
==========================================
- Hits         1558     1110     -448     
+ Misses        387      344      -43     
+ Partials      563      478      -85     

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[ZakariaTalbi]

LGTM