chore: add misc/list-gnophers and .mailmap

.mailmap

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+# man 5 gitmailmap
+# git log --mailmap --pretty=short | grep ^Author: | sort -u
+Jae Kwon <53785+jaekwon@users.noreply.github.com> Jae Kwon <jae@tendermint.com>
+Jae Kwon <53785+jaekwon@users.noreply.github.com> Jae Kwon <jae@gno.land>
+Jae Kwon <53785+jaekwon@users.noreply.github.com> jaekwon <jae@tendermint.com>
+Jae Kwon <53785+jaekwon@users.noreply.github.com> Naut Jae <naut_jae@Nauts-Mac-mini.local>
+Thomas Bruyelle <thomas.bruyelle@tendermint.com> Thomas Bruyelle <thomas.bruyelle@gmail.com>
+Thomas Bruyelle <thomas.bruyelle@tendermint.com> Thomas Bruyelle <thomasbruyelle@hey.com>
+Miloš Živković <milos.zivkovic@tendermint.com> Miloš Živković <milos@zmilos.com>
+Hariom Verma <hariom.verma@tendermint.com> Hariom Verma <hariom18599@gmail.com>
+Giancarlos Salas <me@giansalex.dev> Giancarlos Salas <giansalex@gmail.com>
+Morgan <morgan@morganbaz.com> Morgan <git@howl.moe>

misc/list-gnophers/main.sh

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+#!/bin/sh
+
+main() {
+    cd ../..
+    for file in $(list_gno_files); do
+        extract_file_metadata $file
+    done > gno_file_commits.csv
+    echo
+    cat gno_file_commits.csv | sort_by_date | unique_by_author
+}
+
+list_gno_files() {
+    # list .gno file in examples/, remove tests and unit tests
+    find ./examples -name "*.gno" | grep -v _filetest.gno | grep -v _test.gno | grep -v gno.land/r/demo/tests
+}
+
+extract_file_metadata() {
+    file=$1
+    # get the first commit date of the file
+    first_commit_date=$(git log --pretty=format:%ct --follow $file | tail -n 1)
+    # get the email of the first contributor of the file
+    email=$(git log --mailmap --pretty=format:%aE --follow $file | tail -n 1)
+    # print the file name, first commit date, and email
+    echo "$first_commit_date,$email,$file"
+}
+
+sort_by_date() {
+    sort -t, -k1
+}
+
+unique_by_author() {
+    awk -F, '!seek[$2]++'
+}
+
+main