[cli] Add support for CoAP URI queries in CLI requests

[feherdave]

New feature:
Added CoAP URI query processing functionality to CLI.

Solution:
URI string is checked for a '?' character. If found, the URI query related part is moved to another string. Afterwards, the modified coapUri string will contain only the path-related parts, and a second string (coapUriQuery) will hold only the URI query related parts. Then coapUri is passed to the original otCoapMessageAppendUriPathOptions() method and coapUriQuery is passed to a new method called otCoapMessageAppendUriQueryOptions(), which - similarly to the other - splits the URI query part into more, smaller pieces by the delimiter '&' and adds them as separate options to the CoAP message making the request generated by this CLI function RFC compliant.
If '?' is not found, everything is processed the old way.

[google-cla]

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[size-report]

Size Report of OpenThread

Merging #10003 into main(d0f6d17).

name	branch	text	data	bss	total
ot-cli-ftd	main	467176	856	66364	534396
	#10003	467288	856	66364	534508
	+/-	+112	0	0	+112
ot-ncp-ftd	main	436076	760	61576	498412
	#10003	436076	760	61576	498412
	+/-	0	0	0	0
libopenthread-ftd.a	main	236220	95	40310	276625
	#10003	236278	95	40310	276683
	+/-	+58	0	0	+58
libopenthread-cli-ftd.a	main	57549	0	8075	65624
	#10003	57605	0	8075	65680
	+/-	+56	0	0	+56
libopenthread-ncp-ftd.a	main	31857	0	5916	37773
	#10003	31857	0	5916	37773
	+/-	0	0	0	0
ot-cli-mtd	main	364712	760	51220	416692
	#10003	364824	760	51220	416804
	+/-	+112	0	0	+112
ot-ncp-mtd	main	347244	760	46448	394452
	#10003	347244	760	46448	394452
	+/-	0	0	0	0
libopenthread-mtd.a	main	158331	0	25182	183513
	#10003	158389	0	25182	183571
	+/-	+58	0	0	+58
libopenthread-cli-mtd.a	main	39787	0	8059	47846
	#10003	39843	0	8059	47902
	+/-	+56	0	0	+56
libopenthread-ncp-mtd.a	main	24737	0	5916	30653
	#10003	24737	0	5916	30653
	+/-	0	0	0	0
ot-cli-ftd-br	main	549792	864	131196	681852
	#10003	549904	864	131196	681964
	+/-	+112	0	0	+112
libopenthread-ftd-br.a	main	322951	100	105118	428169
	#10003	323009	100	105118	428227
	+/-	+58	0	0	+58
libopenthread-cli-ftd-br.a	main	71212	0	8099	79311
	#10003	71268	0	8099	79367
	+/-	+56	0	0	+56
ot-rcp	main	62248	564	20604	83416
	#10003	62248	564	20604	83416
	+/-	0	0	0	0
libopenthread-rcp.a	main	9542	0	5052	14594
	#10003	9542	0	5052	14594
	+/-	0	0	0	0
libopenthread-radio.a	main	18870	0	214	19084
	#10003	18870	0	214	19084
	+/-	0	0	0	0

[feherdave]

Any further steps required from my side?

[abtink]

Looks good overall. Thanks @feherdave.
Some suggestions below:

Edit: Also may need to check the CLA -> #10003 (comment) (please ignore this - I see it is good).

[abtink]

Looks great. Thank you. 👍