Feature/dynamic measurements

[dylans-dev]

Proposed Changes

• Add support for dynamic measurement categories.
• The /api/v2/measurement/ endpoint now intercepts requests for dynamic categories (such as BMI) and auto-calculates the results on the fly.
• A new endpoint at /api/v2/measurement-category/dynamic-types/ has been added to expose the available dynamic options.
• An enum is used for the new dynamic options with BMI currently and can be extended for more options and calculations.
• Utils package added with bmi module for BMI calculation.

Related Issue(s)

• Related to this: Dynamic measurements #1560
• For required front-end React changes: Feature/dynamic measurements react#1248

Please check that the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Code has been formatted to avoid unnecessary diffs (ruff format && isort .)
• If the feature is big enough or if there are manual steps needed (deployment
  changes etc.), write a small writeup in CHANGELOG.md

[dylans-dev]

Hey, I've made the requested changes regarding adding dynamic calc params, pagination and cleaned up migrations.
I also want to add a validator shortly with an example of what params should be included for instance with a 1 rep max calculation, since I'm running short on time to implement it in full

[dylans-dev]

Hey, sorry I forgot to review my tests after I made those requested changes, the tests pass on my end now after that latest commit.

[rolandgeider]

Hey, sorry I forgot to review my tests

don't worry, that's why we have 'em! 😄

[dylans-dev]

Hey, sorry I forgot to review my tests

don't worry, that's why we have 'em! 😄

Haha it always happens to me, I'll work on fixing the front end now too.

[rolandgeider]

FYI, since we're getting close to finishing a big release (see e.g. wger-project/flutter#1183), I'm moving this to the next version 2.7 since the dynamic measurements come with some changes to the backend and frontend and I'd be more comfortable with some time