Use global sqlite database instead of per-directory .funky DB

[bbugyi200]

There are several benefits to making this change, including but not limited to:

• Removes the need for .funky files which clutter up project directories.
• Enables local funks to be created in directories the user does not have write permissions for (e.g. system directories)
• Relational database allows for the creation of "parent-child" relationships between sets of funks.

[bchopson]

In addition, this would mitigate the danger of someone sneaking a .funky file into a directory which aliases cd to rm -rf / 😅