`core search` should support platform ID match

[kittaakos]

The current implementation of the core search checks matches based on

• the name or the architecture of the platform, or
  

  arduino-cli/commands/core/search.go

  Line 58 in 8483cb2

  if match(platform.Name, searchArgs) || match(platform.Architecture, searchArgs) {

• the name of a board in the core package
  

  arduino-cli/commands/core/search.go

  Line 68 in 8483cb2

  if match(board.Name, searchArgs) {

Would it be possible to search by the platform ID?

arduino-cli/rpc/commands/core.proto

Line 88 in 8483cb2

string ID = 1;

Current behavior:

akos.kitta@Akoss-MacBook-Pro arduino-cli % ./arduino-cli core search
ID                   Version   Name                                             
Arrow:samd           2.1.0     Arrow Boards                                     
Intel:arc32          2.0.4     Intel Curie Boards                               
Intel:i586           1.6.7+1.0 Intel i586 Boards                                
Intel:i686           1.6.7+1.0 Intel i686 Boards                                
Microsoft:win10      1.1.2     Windows 10 Iot Core                              
arduino:avr          1.8.2     Arduino AVR Boards                               
arduino:mbed         1.1.4     Arduino nRF528x Boards (Mbed OS)                 
arduino:megaavr      1.8.5     Arduino megaAVR Boards                           
arduino:nrf52        1.0.2     Arduino nRF52 Boards                             
arduino:sam          1.6.12    Arduino SAM Boards (32-bits ARM Cortex-M3)       
arduino:samd         1.8.5     Arduino SAMD Boards (32-bits ARM Cortex-M0+)     
arduino:samd_beta    1.6.25    Arduino SAMD Beta Boards (32-bits ARM Cortex-M0+)
atmel-avr-xminis:avr 0.6.0     Atmel AVR Xplained-minis                         
emoro:avr            3.2.2     EMORO 2560                                       
industruino:samd     1.0.1     Industruino SAMD Boards (32-bits ARM Cortex-M0+) 
littleBits:avr       1.0.0     littleBits Arduino AVR Modules                   

akos.kitta@Akoss-MacBook-Pro arduino-cli % ./arduino-cli core search "arduino:sam"
No platforms matching your search.

Expected behavior:

akos.kitta@Akoss-MacBook-Pro arduino-cli % ./arduino-cli core search "arduino:sam"
ID          Version Name                                      
arduino:sam 1.6.12  Arduino SAM Boards (32-bits ARM Cortex-M3)

Workaround:
I run a wildcard query and filter the results by the platform ID.

Arduino CLI version:

• I built one from the sources: 8483cb2,
• OS: macOS 10.15.3

[kittaakos]

PR: #615