Pdfplumber: Integration (#12949)

This pull request integrates the Dockerfile needed to build the fuzzers
for pdfplumber.

Note: The fuzzers were NOT merged upstream following discussion with the
project maintainer
[here](jsvine/pdfplumber#1245 (comment))
and with the precedence for out-of-repo fuzzers established
[here](#12467)

---------

Co-authored-by: bcapuano <bcapuano@asu.edu>
Co-authored-by: Bailey Capuano <32396237+capuanob@users.noreply.github.com>

Author: ennamarie19

projects/pdfplumber/Dockerfile

@@ -0,0 +1,29 @@
+# Copyright 2025 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-python
+RUN pip3 install --upgrade pip
+RUN mkdir $SRC/corpus
+
+# Upstream wants fuzzers hosted elsewhere, so pull them from fork (https://github.com/jsvine/pdfplumber/pull/1245#issuecomment-2581682100)
+RUN git clone --depth 1 https://github.com/ennamarie19/pdfplumber.git pdfplumber_fuzzer
+
+RUN git clone --depth 1 https://github.com/jsvine/pdfplumber.git pdfplumber \
+        && rm -rf pdfplumber/fuzz  # Remove the directory, if it exists
+RUN cp -r pdfplumber_fuzzer/fuzz pdfplumber \
+        && cp pdfplumber/fuzz/build.sh $SRC/
+WORKDIR $SRC/pdfplumber
+