Fix overriding default formatters in the user configuration

[trufae]

My Report

My project have a .clang-format file in the home directory, opencode will ALWAYS run clang-format if that file exists. using custom configurations like disableing formatters is totally ignored, so i had to apply this fix to tell it not to ignore me.

Grok Explanation of the bug and the fix

The bug was that the formatters object was keyed by the export names from the Formatter module (e.g., 'clang'), but the configuration uses the name property of each formatter (e.g., "clang-format"). This mismatch meant that disabling a formatter in the config, like setting "clang-format": { "disabled": true }, wouldn't actually remove it because delete formatters["clang-format"] was trying to delete a key that didn't exist.

I fixed this by rebuilding the formatters object to use the name property as keys instead of the export names. Now the keys match what the config expects, so disabling formatters works correctly.

[rekram1-node]

@trufae it gets respected if you ignore like so:

{
  "$schema": "https://opencode.ai/config.json",
  "formatter": {
    "clang": {
      "disabled": true
    }
  }
}

[trufae]

Ouch! i was trying clang-format instead of "clang". that worked

[rekram1-node]

@trufae as you noticed tho we should probably change the name or the docs to be consistent, I think if we merge this pr it would actually make more sense potentially just need to double check all the other formatters will remain as expected but i think:
https://opencode.ai/docs/formatters/#built-in

doing this makes more sense given docs

right?