Introduce Langium 3.0.0

[Lotes]

• changes the imports to Langium (ESM modules with scope of grammar, lsp, ...)
• changes the imports to local files (appending .js)
• ESBuild was also updated
• ESBuild script files were modernized

[spoenemann]

I tried the PR in Gitpod and get the following error when launching the extension:

Error: Cannot find module '/workspace/langium-sql/packages/langium-sql-vscode/dist/node/language-server'
    at Function._resolveFilename (node:internal/modules/cjs/loader:1077:15)
    at Function._load (node:internal/modules/cjs/loader:922:27)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
    at node:internal/main/run_main_module:23:47 {
  code: 'MODULE_NOT_FOUND',
  requireStack: []
}

[Lotes]

Fixed. Thanks @spoenemann !