feat(apidom-converter): add example plugin

[kowalczyk-krzysztof]

Scaffolding an example of converter code. Need some feedback @char0n

I'm also running into some issues with npm run build locally, specifically npm run build:umd:browser.
It seems to be caused by the import below (removing this import fixes browser build):

import { parse } from '@swagger-api/apidom-parser-adapter-yaml-1-2';

Build logs:

ERROR in ../../node_modules/web-tree-sitter/tree-sitter.js 1:686-709
Module not found: Error: Can't resolve 'path' in '/Users/krzysztof.kowalczyk/Desktop/apidom/node_modules/web-tree-sitter'

BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default.
This is no longer the case. Verify if you need this module and configure a polyfill for it.

If you want to include a polyfill, you need to:
        - add a fallback 'resolve.fallback: { "path": require.resolve("path-browserify") }'
        - install 'path-browserify'
If you don't want to include a polyfill, you can use an empty module like this:
        resolve.fallback: { "path": false }
 @ ../apidom-parser-adapter-yaml-1-2/es/lexical-analysis/browser.mjs 2:0-37 20:21-32 20:46-66 21:33-39
 @ ../apidom-parser-adapter-yaml-1-2/es/adapter-browser.mjs 1:0-61 4:0-46 7:22-37 16:20-35
 @ ./src/index.ts 1:0-68 5:23-28

ERROR in ../../node_modules/web-tree-sitter/tree-sitter.js 1:760-773
Module not found: Error: Can't resolve 'fs' in '/Users/krzysztof.kowalczyk/Desktop/apidom/node_modules/web-tree-sitter'
 @ ../apidom-parser-adapter-yaml-1-2/es/lexical-analysis/browser.mjs 2:0-37 20:21-32 20:46-66 21:33-39
 @ ../apidom-parser-adapter-yaml-1-2/es/adapter-browser.mjs 1:0-61 4:0-46 7:22-37 16:20-35
 @ ./src/index.ts 1:0-68 5:23-28

ERROR in ../../node_modules/web-tree-sitter/tree-sitter.wasm 1:0
Module parse failed: Unexpected character '' (1:0)
The module seem to be a WebAssembly module, but module is not flagged as WebAssembly module for webpack.
BREAKING CHANGE: Since webpack 5 WebAssembly is not enabled by default and flagged as experimental feature.
You need to enable one of the WebAssembly experiments via 'experiments.asyncWebAssembly: true' (based on async modules) or 'experiments.syncWebAssembly: true' (like webpack 4, deprecated).
For files that transpile to WebAssembly, make sure to set the module type in the 'module.rules' section of the config (e. g. 'type: "webassembly/async"').
(Source code omitted for this binary file)
 @ ../apidom-parser-adapter-yaml-1-2/es/lexical-analysis/browser-patch.mjs 4:0-62 13:42-56
 @ ../apidom-parser-adapter-yaml-1-2/es/lexical-analysis/browser.mjs 1:0-29
 @ ../apidom-parser-adapter-yaml-1-2/es/adapter-browser.mjs 1:0-61 4:0-46 7:22-37 16:20-35
 @ ./src/index.ts 1:0-68 5:23-28

ERROR in ../apidom-parser-adapter-yaml-1-2/wasm/tree-sitter-yaml.wasm 1:0
Module parse failed: Unexpected character '' (1:0)
The module seem to be a WebAssembly module, but module is not flagged as WebAssembly module for webpack.
BREAKING CHANGE: Since webpack 5 WebAssembly is not enabled by default and flagged as experimental feature.
You need to enable one of the WebAssembly experiments via 'experiments.asyncWebAssembly: true' (based on async modules) or 'experiments.syncWebAssembly: true' (like webpack 4, deprecated).
For files that transpile to WebAssembly, make sure to set the module type in the 'module.rules' section of the config (e. g. 'type: "webassembly/async"').
(Source code omitted for this binary file)
 @ ../apidom-parser-adapter-yaml-1-2/es/lexical-analysis/browser.mjs 6:0-62 20:67-81
 @ ../apidom-parser-adapter-yaml-1-2/es/adapter-browser.mjs 1:0-61 4:0-46 7:22-37 16:20-35
 @ ./src/index.ts 1:0-68 5:23-28

[char0n]

Superseeded by #3755