Remove Babel (which was not really necessary), replace it by acorn if needed, close #105

[Kocal]

Babel configuration files .babel.rc and babel.config.js were not used (anymore), @babel/parser can be replaced by acorn that we already use, so we can remove Babel and remove ~120 devDependencies:

• before:

Progress: resolved 1, reused 0, downloaded 0, added 0
Progress: resolved 11[8](https://github.com/symfony/stimulus-bridge/actions/runs/13026638540/job/36336794852?pr=115#step:6:9), reused 1, downloaded 99, added 0
Progress: resolved 284, reused 1, downloaded 243, added 0
Packages: +360
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Progress: resolved 423, reused 1, downloaded 364, added 360, done
.../[email protected]/node_modules/esbuild postinstall$ node install.js
.../node_modules/@biomejs/biome postinstall$ node scripts/postinstall.js
.../[email protected]/node_modules/esbuild postinstall: Done
.../node_modules/@biomejs/biome postinstall: Done

dependencies:
+ @hotwired/stimulus-webpack-helpers 1.0.1
+ @types/webpack-env 1.18.8
+ loader-utils 3.3.1
+ schema-utils 4.3.0

devDependencies:
+ @babel/core 7.26.7
+ @babel/parser 7.26.7
+ @babel/preset-env 7.26.7
+ @babel/preset-typescript 7.26.0
+ @babel/types 7.26.7
+ @biomejs/biome 1.[9](https://github.com/symfony/stimulus-bridge/actions/runs/13026638540/job/36336794852?pr=115#step:6:10).4
+ @hotwired/stimulus 3.2.2
+ @rollup/plugin-typescript 12.1.2
+ @symfony/mock-module 1.0.0
+ @testing-library/jest-dom 6.6.3
+ acorn 8.14.0
+ jsdom 26.0.0
+ json5 2.2.3
+ rolldown 1.0.0-beta.3
+ tslib 2.8.1
+ typescript 4.9.5 (5.7.3 is available)
+ vitest 3.0.4
+ webpack 5.97.1
+ webpack-cli 5.1.4 (6.0.1 is available)

 WARN  Issues with peer dependencies found
.
└─┬ valibot 1.0.0-beta.[12](https://github.com/symfony/stimulus-bridge/actions/runs/13026638540/job/36336794852?pr=115#step:6:13)
  └── ✕ unmet peer typescript@>=5: found 4.9.5

Done in 3.9s

• after:

Progress: resolved 1, reused 0, downloaded 0, added 0
Progress: resolved 68, reused 1, downloaded 27, added 0
Progress: resolved 210, reused 1, downloaded 173, added 0
Packages: +241
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Progress: resolved 304, reused 1, downloaded 245, added 241, done
.../node_modules/@biomejs/biome postinstall$ node scripts/postinstall.js
.../[email protected]/node_modules/esbuild postinstall$ node install.js
.../node_modules/@biomejs/biome postinstall: Done
.../[email protected]/node_modules/esbuild postinstall: Done
dependencies:
+ @hotwired/stimulus-webpack-helpers 1.0.1
+ @types/webpack-env 1.18.8
+ loader-utils 3.3.1
+ schema-utils 4.3.0
devDependencies:
+ @biomejs/biome 1.[9](https://github.com/symfony/stimulus-bridge/actions/runs/13026994439/job/36337823223?pr=116#step:6:9).4
+ @hotwired/stimulus 3.2.2
+ @rollup/plugin-typescript 12.1.2
+ @symfony/mock-module 1.0.0
+ @testing-library/jest-dom 6.6.3
+ acorn 8.14.0
+ jsdom 26.0.0
+ json5 2.2.3
+ rolldown 1.0.0-beta.3
+ tslib 2.8.1
+ typescript 4.9.5 (5.7.3 is available)
+ vitest 3.0.4
+ webpack 5.97.1
+ webpack-cli 5.1.4 (6.0.1 is available)
 WARN  Issues with peer dependencies found
.
└─┬ valibot 1.0.0-beta.[12](https://github.com/symfony/stimulus-bridge/actions/runs/13026994439/job/36337823223?pr=116#step:6:12)
  └── ✕ unmet peer typescript@>=5: found 4.9.5
Done in 3.5s