Migration cleanup

[damms005]

Most folks did not see the migration schema dump feature coming. This made lots of us implement data changes inside migrations. When the schema dump/pruning feature was released, it was not usable for lots of apps because of this very reason.

Proposal: a new migrate:cleanup command

The command will create new sub directories in the migrations folder, named per year, and move migration files in the same year to the same directory.

Before:

migrations/
├── 2016_01_01_123456_create_users_table.php
├── 2016_01_05_123456_create_posts_table.php
├── 2016_01_10_123456_create_comments_table.php
├── 2017_02_01_123456_create_tags_table.php
├── 2017_03_01_123456_create_follows_table.php
...

After:

migrations/
├── 2016
│   ├── 2016_01_01_123456_create_users_table.php
│   ├── 2016_01_05_123456_create_posts_table.php
│   ├── 2016_01_10_123456_create_comments_table.php
├── 2017
│   ├── 2017_02_01_123456_create_tags_table.php
│   ├── 2017_03_01_123456_create_follows_table.php
...

This will achieve a similar result (in terms of cleanup/organization) to shema dumping because several tens or hundreds of migration files can now be nicely tucked inside few yearly subfolders