Refactor find, logger, readers, wildfire/pennant examples, sqlite tests

[Vedant1]

• Find should have standardized return object from sqlite: ValueObject
• Unique find functions for table, col, or cell match
• a find all function which collates all these individual searches into one large list
• any find function should only access first backend loaded in
• update find test functions in test_sqlite.py
• logger now uses levels 0, 1, 2 for verbosity of print statements
• all backends/readers/writers should return error messages instead of printing to console
  • for the purpose of logger catching all error messages
• standardize any mention of a "run table" in DSI to be a runTable object: whether a variable or creating it in a backend
• update error catching for any core functions to ensure all inputs were correct
• create a close function which closes all backends/plugins and clears the abstraction
• get/inspect artifacts should only access first backend loaded in
• read artifacts should only access first back-READ backend loaded in
• create a reader specific to wildfire data and any post-process data
• wildfire reader creates manual sim table where each row of data is its own simulation
• update error catching for table plot plugin writer
• csv and table plot writer take in optional argument of a list of column names
• update wildfire and pennant examples to use the wildfire reader with a manual simulation table
• update descriptions of all relevant functions in core/sqlite/file_reader/file_writer/metadata