Feature Request: add option for "in place" find and replace

[ElectricRCAircraftGuy]

Describe your feature request

Please add a -i / --in-place option (like in sed) to edit files in place. I'd really like to use ripgrep for find and replace across code bases, since it's so fast, but currently it requires some pretty difficult work-arounds to accomplish the desired behavior.

Ex: for a single file I do this to replace all instances of blue with red in file ip.txt:

file_contents_and_stats="$(rg --stats --passthru 'blue' -r 'red' ip.txt)"
NUM_STATS_LINES=9
file_contents="$(head -n -$NUM_STATS_LINES "$file_contents_and_stats")"
stats="$(tail -n $NUM_STATS_LINES "$file_contents_and_stats")"
printf "%s" "$file_contents" > ip.txt
printf "%s" "$stats"

...but when trying to find across many files, this becomes much much harder, and I must first obtain a file list with rg -l then operate on that.

[BurntSushi]

Dupe of #74.

[ElectricRCAircraftGuy]

For anyone looking for this feature, see here; I just wrote a wrapper and added it: #74 (comment)