Adding --sourcemap and ignores.

It does create the sourcemap in out/extension.js.map but does not include it in the vsix.

.gitignore

@@ -6,4 +6,3 @@ node_modules
 coverage/
 .nyc_output/
 .DS_Store
-extension

.vscodeignore

@@ -12,4 +12,6 @@ CODEOWNERS
 RELEASE.md
 coverage/
 .nyc_output/
-.github
+.github
+out/
+!out/extension.js

package.json

@@ -50,7 +50,7 @@
     "test-coverage": "node ./out/test/runTest.js --coverage",
     "prettier:write": "prettier --write \"src/**/*.{ts, js}\"",
     "prettier:verify": "prettier --list-different \"src/**/*.{ts, js}\"",
-    "bundle:extension": "esbuild ./src/extension.ts  --bundle --outdir=out --format=cjs --target=es2020 --platform=node --external:vscode --external:@salesforce/core --external:@salesforce/lwc-dev-mobile-core --external:@salesforce/sf-plugins-core --minify",
+    "bundle:extension": "esbuild ./src/extension.ts  --bundle --outdir=out --format=cjs --target=es2020 --platform=node --external:vscode --external:@oclif/core --minify --sourcemap",
     "vscode:prepublish": "npm run clean && npm run bundle:extension && npm prune --omit=dev"
   },
   "devDependencies": {