Add version bump scripts

script/bump-app-version

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+exec script/lib/bump-version.sh zed v $@

script/bump-collab-version

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+exec script/lib/bump-version.sh collab collab-v $@

script/lib/bump-version.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+set -eu
+
+if [[ $# < 3 ]]; then
+  echo "Missing version increment (major, minor, or patch)" >&2
+  exit 1
+fi
+
+package=$1
+tag_prefix=$2
+version_increment=$3
+
+if [[ -n $(git status --short --untracked-files=no) ]]; then
+  echo "Can't push a new version with uncommitted changes"
+  exit 1
+fi
+
+which cargo-set-version > /dev/null || cargo install cargo-edit
+cargo set-version --package $package --bump $version_increment
+cargo check --quiet
+
+new_version=$(cargo metadata --no-deps --format-version=1 | jq --raw-output ".packages[] | select(.name == \"${package}\") | .version")
+branch_name=$(git rev-parse --abbrev-ref HEAD)
+old_sha=$(git rev-parse HEAD)
+tag_name=${tag_prefix}${new_version}
+
+git commit --quiet --all --message "${package} ${new_version}"
+git tag ${tag_name}
+
+cat <<MESSAGE
+Committed and tagged ${package} version ${new_version}
+
+To push this:
+    git push origin ${tag_name} ${branch_name}
+
+To undo this:
+    git tag -d ${tag_name} && git reset --hard $old_sha
+MESSAGE