Enable staging Firebase database

[rugeli]

Problem

What is the problem this work solves, including
#214

Solution

What I/we did to solve this problem

• stored staging firebase database credentials in a .env file
  • the .env should look like:
    FIREBASE_TOKEN=["private_key"]
FIREBASE_EMAIL=["client_email"]
• developed functions that allow user to choose from dev or stag db

Next steps:

• validate the input path validate firebase recipe packing paths with explicit error messaging #212
• handle cases like: no recipe/data found in the selected db. Provide clear error messages

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)

Steps to Verify:

1. obtain credentials to put in the .env (Ruge will invite @mogres to cellPACK staging db)
2. upload a recipe to staging - upload -r examples/recipes/v2/one_sphere.json
3. pack the uploaded recipe - pack -r firebase:recipes/one_sphere_v_1.0.0 -c examples/packing-configs/run.json
4. pack a local recipe and choose a database to save the result file metadata

Screenshots (optional):

[github-actions]

Packing analysis report

Analysis for packing results located at cellpack/tests/outputs/test_spheres/spheresSST

Ingredient name	Encapsulating radius	Average number packed
ext_A	25	236.0

Packing image

Distance analysis

Expected minimum distance: 50.00
Actual minimum distance: 50.01

Ingredient key	Pairwise distance distribution
ext_A

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (eb4c0fa) 98.63% compared to head (95836aa) 98.63%.
Report is 1 commits behind head on main.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #218   +/-   ##
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  Coverage   98.63%   98.63%           
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  Files          18       18           
  Lines         511      511           
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  Hits          504      504           
  Misses          7        7           

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[meganrm]

looks great, sorry this took so long to review!

[mogres]

Looks good to me! Thanks for the update.

[mogres]

Looks good to me! Thanks for the update.