Implement TOML & JSON support in Bun's new bundler

[Jarred-Sumner]

• This also fixes a crash with empty content (probably)
• This also fixes unbound namespace imports causing missing content

[github-actions]

❌ @Jarred-Sumner 13 files with test failures on linux-x64:

• test/bundler/esbuild/default.test.ts
• test/bundler/esbuild/importstar.test.ts
• test/bundler/esbuild/splitting.test.ts
• test/bundler/transpiler.test.js
• test/js/bun/http/serve.test.ts
• test/js/bun/plugin/plugins.test.ts
• test/js/bun/resolve/import-meta.test.js
• test/js/bun/resolve/png/test-png-import.test.js
• test/js/bun/test/snapshot-tests/snapshots/more-snapshots/different-directory.test.ts
• test/js/bun/test/snapshot-tests/snapshots/more.test.ts
• test/js/bun/test/test-test.test.ts
• test/js/node/child_process/child_process-node.test.js
• test/js/node/stubs.test.js

View test output

^{#d58d6ecf39bdc46895198d72723eba87ade8294d}

[github-actions]

❌ @Jarred-Sumner 13 files with test failures on linux-x64-baseline:

• test/bundler/esbuild/default.test.ts
• test/bundler/esbuild/importstar.test.ts
• test/bundler/esbuild/splitting.test.ts
• test/bundler/transpiler.test.js
• test/js/bun/http/serve.test.ts
• test/js/bun/plugin/plugins.test.ts
• test/js/bun/resolve/import-meta.test.js
• test/js/bun/resolve/png/test-png-import.test.js
• test/js/bun/test/snapshot-tests/snapshots/more-snapshots/different-directory.test.ts
• test/js/bun/test/snapshot-tests/snapshots/more.test.ts
• test/js/bun/test/test-test.test.ts
• test/js/node/child_process/child_process-node.test.js
• test/js/node/stubs.test.js

View test output

^{#d58d6ecf39bdc46895198d72723eba87ade8294d}