pdf-js: initial integration (#11270)

[PDF.js](https://mozilla.github.io/pdf.js/) is a Portable Document
Format (PDF) viewer that is built with HTML5.
 - It has `44.6k` stars on github.
 - PDF.js is built into version 19+ of Firefox.
- Available as extension for Chrome at [Chrome Web
Store](https://chrome.google.com/webstore/detail/pdf-viewer/oemmndcbldboiebfnladdacbdfmadadm)

projects/pdf-js/Dockerfile

@@ -0,0 +1,21 @@
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+FROM gcr.io/oss-fuzz-base/base-builder-javascript
+RUN apt-get update && apt-get install -y make autoconf automake libtool
+RUN git clone --depth 1 https://github.com/mozilla/pdf.js pdf-js
+WORKDIR pdf-js
+COPY build.sh $SRC/

projects/pdf-js/build.sh

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+#!/bin/bash -eu
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+npm install --save-dev @jazzer.js/core 
+npm install -g gulp-cli
+
+gulp image_decoders
+
+compile_javascript_fuzzer pdf-js test/fuzz/jpeg_image.fuzz --sync
+compile_javascript_fuzzer pdf-js test/fuzz/jbig2_image.fuzz --sync
+compile_javascript_fuzzer pdf-js test/fuzz/jpx_image.fuzz --sync

projects/pdf-js/project.yaml

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+homepage: "https://github.com/mozilla/pdf.js"
+language: javascript
+primary_contact: "mcastelluccio@mozilla.com"
+main_repo: "https://github.com/mozilla/pdf.js"
+vendor_ccs:
+  - maxnair.dev@gmail.com
+fuzzing_engines:
+  - libfuzzer
+sanitizers:
+  - none