inventory: add basic inventory

We should write in here what we got left from FOSDEM

approved this merge request

added 3 commits

• bba09eec...2915258c - 2 commits from branch main
• 1b6413b0 - inventory: add basic inventory

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added 1 commit

• f6bbd45d - inventory: add basic inventory

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I bought 4 phone stands to try for the next conference in Europe, hopefully they work nicely.

Expense: https://opencollective.com/postmarketos/expenses/245172

This one: https://www.aliexpress.com/item/1005005407671070.html

added 2 commits

• 1c455eb6 - 1 commit from branch main
• 70e04bdd - inventory: add basic inventory

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added 1 commit

• 7c576efa - inventory: add basic inventory

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resolved all threads