Move the base CodeMirror KCL support to a local package (#4897)

* Move CodeMirror LRLanguage to new file

This separates the base language support from the LSP and color picker.

* Move the base CodeMirror KCL support to a local package

* Start CodeMirror grammar tests

* Exclude vitest config in tsconfig

* Add KCL path to tsconfig

* Remove stray import

* Drop extension from import

* Use __filename for commonjs compat

* Check exec return before access

* Build ES and CJS to dist

* Format

* Exclude all.test.ts from codespell

This is to work around "fileTests" imported from Lezer. Future codespell versions look
like they'll allow the code to be annotated, which would be nicer.

---------

Co-authored-by: Matt Mundell <matt@mundell.me>

packages/codemirror-lang-kcl/test/all.test.ts

@@ -0,0 +1,22 @@
+import { KclLanguage } from '../src/index'
+import { fileTests } from '@lezer/generator/dist/test'
+
+import * as fs from 'fs'
+import * as path from 'path'
+
+let caseDir = path.dirname(__filename)
+
+for (let file of fs.readdirSync(caseDir)) {
+  if (!/\.txt$/.test(file)) continue
+
+  let fname = /^[^\.]*/.exec(file)?.at(0)
+  if (fname) {
+    let tests = fileTests(
+      fs.readFileSync(path.join(caseDir, file), 'utf8'),
+      file
+    )
+    describe(fname, () => {
+      for (let { name, run } of tests) it(name, () => run(KclLanguage.parser))
+    })
+  }
+}