Change build system to hereby

This eliminates a significant number of dependencies, eliminating all
npm audit issues, speeding up `npm ci` by 20%, and overall making the
build faster (faster startup, direct code is faster than streams, etc)
and clearer to understand.

I'm finding it much easier to make build changes for the module
transform with this; I can more clearly indicate task dependencies and
prevent running tasks that don't need to be run.

Given we're changing our build process entirely (new deps, new steps),
it seems like this is a good time to change things up.

.github/workflows/accept-baselines-fix-lints.yaml

@@ -17,8 +17,8 @@ jobs:
         git config user.name "TypeScript Bot"
         npm install
         git rm -r --quiet tests/baselines/reference :^tests/baselines/reference/docker :^tests/baselines/reference/user
-        gulp runtests-parallel --ci --fix || true
-        gulp baseline-accept
+        npx hereby runtests-parallel --ci --fix || true
+        npx hereby baseline-accept
         git add ./src
         git add ./tests/baselines/reference
         git diff --cached

.github/workflows/ci.yml

@@ -69,11 +69,8 @@ jobs:
     - name: Adding playwright
       run: npm install --no-save --no-package-lock playwright
 
-    - name: Build local
-      run: gulp local
-
     - name: Validate the browser can import TypeScript
-      run: gulp test-browser-integration
+      run: npx hereby test-browser-integration
 
   typecheck:
     runs-on: ubuntu-latest
@@ -102,10 +99,10 @@ jobs:
     - run:  npm ci
 
     - name: Build scripts
-      run: gulp scripts
+      run: npx hereby scripts
 
     - name: ESLint tests
-      run: gulp run-eslint-rules-tests
+      run: npx hereby run-eslint-rules-tests
 
   self-check:
     runs-on: ubuntu-latest
@@ -119,10 +116,10 @@ jobs:
     - run:  npm ci
 
     - name: Build tsc
-      run: gulp tsc
+      run: npx hereby tsc
 
     - name: Clean
-      run: gulp clean-src
+      run: npx hereby clean-src
 
     - name: Self build
-      run: gulp build-src --built
+      run: npx hereby build-src --built

.github/workflows/new-release-branch.yaml

@@ -21,7 +21,7 @@ jobs:
         sed -i -e 's/const versionMajorMinor = ".*"/const versionMajorMinor = "${{ github.event.client_payload.core_major_minor }}"/g' tests/baselines/reference/api/tsserverlibrary.d.ts
         sed -i -e 's/const version\(: string\)\{0,1\} = `${versionMajorMinor}.0-.*`/const version = `${versionMajorMinor}.0-${{ github.event.client_payload.core_tag || 'dev' }}`/g' src/compiler/corePublic.ts
         npm ci
-        gulp LKG
+        npx hereby LKG
         npm test
         git diff
         git add package.json

.github/workflows/nightly.yaml

@@ -23,10 +23,10 @@ jobs:
       run: |
         npm whoami
         npm ci
-        gulp configure-nightly
-        gulp LKG
-        gulp runtests-parallel
-        gulp clean
+        npx hereby configure-nightly
+        npx hereby LKG
+        npx hereby runtests-parallel
+        npx hereby clean
         npm publish --tag next
       env:
         NODE_AUTH_TOKEN: ${{secrets.npm_token}}

.github/workflows/release-branch-artifact.yaml

@@ -19,11 +19,11 @@ jobs:
     - name: Adding playwright
       run: npm install --no-save --no-package-lock playwright
     - name: Validate the browser can import TypeScript
-      run: gulp test-browser-integration
+      run: npx hereby test-browser-integration
     - name: LKG, clean, and pack
       run: |
-        gulp LKG
-        gulp clean
+        npx hereby LKG
+        npx hereby clean
         npm pack ./
         mv typescript-*.tgz typescript.tgz
     - name: Upload built tarfile

.github/workflows/set-version.yaml

@@ -27,7 +27,7 @@ jobs:
         sed -i -e 's/const versionMajorMinor = ".*"/const versionMajorMinor = "${{ github.event.client_payload.core_major_minor }}"/g' tests/baselines/reference/api/tsserverlibrary.d.ts
         sed -i -e 's/const version\(: string\)\{0,1\} = .*;/const version = "${{ github.event.client_payload.package_version }}" as string;/g' src/compiler/corePublic.ts
         npm ci
-        gulp LKG
+        npx hereby LKG
         npm test
         git diff
         git add package.json

.github/workflows/update-lkg.yml

@@ -16,7 +16,7 @@ jobs:
         git config user.email "typescriptbot@microsoft.com"
         git config user.name "TypeScript Bot"
         npm ci
-        gulp LKG
+        npx hereby LKG
         npm test
         git diff
         git add ./lib