Create a cli for batch search and replace of language string customizations

Interactive mode   A1) Execute   php admin/tool/customlang/cli/batchreplace.php -s='Dashboard' -r='Replacement'   A2) Confirm that there are 61 matches to this search   A3) Enter `a` to stage this match and all later matches in the search   A4) Confirm that the program says there are 7 strings unsafe for replacement   A5) Manually go trough these, since there is no `a` option   A6) The program will prompt the user one more time before saving, if any mistakes are made. Enter `y`   A7) Confirm that program says `Saving...` and `Succesfully replaced strings`   A8) Open site   A9) Confirm that language is english   A10) Confirm that `Dashboard` has been replaced with `Replacement`   A11) Open `admin/tool/customlang/index.php`   A12) Select enlgish language pack   A13) Click `Open language pack for editiing` button   A14) Click `Continue` button   A15) Select all components   A16) Enter `Dashboard` in `Only strings containing` input box   A17) Click `Show strings` button   A18) Confirm that `Local customisation` column contains replaced values     Non interactive mode   B1) Execute    php admin/tool/customlang/cli/batchreplace.php -s='Dashboard' -r='Second Replacement' -n   B2) Confirm that program only outputs the searches found   B3) Execute   php admin/tool/customlang/cli/batchreplace.php -s='Dashboard' -r='Second Replacement' -y   B4) Confirm that program outputs differnce made   B5) Follow steps A7 to A9   B6) Confirm that `Replacement` has been replaced with `Second Replacement`   B7) Follow steps A11 to A18   Regex with non-interactive assume-no   C1) Execute    php admin/tool/customlang/cli/batchreplace.php -s="/( [A-Z] )\w+/" -r="Hello" -n --regex   C2) Confirm that program only outputs searches found and highlights words that start with a capital letter.