pwmgr

Move imgui code to "external" directory.

Setting default focus on filter text box for account screen. Also adding
ImGui example program for reference.

Update Dear ImGui to v1.91.5.

Add the ability to specify the input file path as a command line argument. Bumping to v0.1.4.

Tokenize a filter criteria and then search the catalog for feach filter
criteria token.

Update catalog decode status message.

Remove dependence on exernal font file. Used binary_to_compressed_c
utility to convert Roboto Medium font into compressed array so that it
can be included directly within the source code.

Add missing FindSodium.cmake file. Add minor fix for clear filter button
and move it next to the filter text box.

Significant improvements including reading input from encrypted file.
Also added crypto utility to en/decrypt a file.

Improved filtering and added parsing input from a plaintext file.