feat: support SHOW query results and Y to copy row

[bobchandler]

eg: SHOW VARIABLES LIKE 'innodb_buffer_pool_size';

Variable_name Value
innodb_buffer_pool_size 1073741824

[jorgerojas26]

Hello, thanks for the PR.

While i like the idea of the "copy as" feature, I think those are too many shortcuts to remember just for copying. I was thinking a better way to do it could be 'y' for copying the cell as text, 'Y' will copy the entire row as text (or maybe CSV) by default, and 'CTRL + y' would open a popup with a list of "copy as" options. What do you think?

[bobchandler]

indeed, that is correct thinking to reduce shortcuts for copying.

[bobchandler]

6d1da1f: support show command, if not that feature, execute show command, 0 rows affected.
36a2934: y copy cell value, Y copy entire row.
203f4e0: add Ctrl+s to copy as SELECT WHERE, add Ctrl+u to copy as UPDATE, add Ctrl+i to copy as INSERT
09aa01a: In sql editor(c-e), use c-y to copy current sql.
49af011: tree group , copy node name, eg: database name, table name.
3f2996f: add copyas option
7d259d5: revert before c-i, c-s, c-u(203f4e0)

[bobchandler]

@jorgerojas26 that is all feature