Please check if the PR fulfills these requirements

See how to contribute

• The PR has no duplicates (please search among the Pull Requests
  before creating one)
• The PR follows
  our contributing guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• UPGRADING.md has been updated with a migration guide (for breaking changes)
• configuration.schema.json updated if new parameters are added.

What kind of change does this PR introduce?

There are 3 changes in the way debug configuration is build:

1. debug.server.openocd.scripts is now an array, so multiple scripts may be provided

   debug.server.openocd.scripts.0=first_script
   debug.server.openocd.scripts.1=second_script
   debug.server.openocd.scripts.2=third_script
   

   debug.server.openocd.script (singular) is still supported but deprecated.
2. The new parameter svd_file has been added

   debug.svd_file=svd-file
   

3. Added the possibility to inject custom parameters for the cortex-debug plugin of the Arduino IDE 2.0, via the subtree debug.cortex-debug.custom.* configuration keys

   debug.cortex-debug.custom.postAttachCommands.0=set remote hardware-watchpoint-limit 2
   debug.cortex-debug.custom.postAttachCommands.1=monitor reset halt
   debug.cortex-debug.custom.postAttachCommands.2=monitor gdb_sync
   debug.cortex-debug.custom.postAttachCommands.3=thb setup
   debug.cortex-debug.custom.postAttachCommands.4=c
   debug.cortex-debug.custom.overrideRestartCommands.0=monitor reset halt
   debug.cortex-debug.custom.overrideRestartCommands.1=monitor gdb_sync
   debug.cortex-debug.custom.overrideRestartCommands.2=thb setup
   debug.cortex-debug.custom.overrideRestartCommands.3=c
   debug.cortex-debug.custom.anotherStringParamer=hellooo
   

   the above is intended to be directly injected in the launch.json generated by the Arduino IDE. The array-style keys (ending with a numeric index something.0=... are automatically converted into JSON arrays. For example the configuration above will produce the following:

   "cortex-debug_custom_configuration": {
    "anotherStringParamer": "hellooo",
    "overrideRestartCommands": [
    "monitor reset halt",
    "monitor gdb_sync",
    "thb setup",
    "c"
    ],
    "postAttachCommands": [
    "set remote hardware-watchpoint-limit 2",
    "monitor reset halt",
    "monitor gdb_sync",
    "thb setup",
    "c"
    ]
   }

What is the current behavior?

The added parameters are ignored.

What is the new behavior?

The added parameters are supported.

Does this PR introduce a breaking change, and is titled accordingly?

Only in the gRPC API.

Other information