Add change password

[orronai]

• Added tests
• Added template and css style
• Added the background form

[sourcery-ai]

Sourcery Code Quality Report

❌  Merging this PR will decrease code quality in the affected files by 0.13%.

Quality metrics	Before	After	Change
Complexity	1.76 ⭐	1.68 ⭐	-0.08 👍
Method Length	33.20 ⭐	33.85 ⭐	0.65 👎
Working memory	6.35 🙂	6.36 🙂	0.01 👎
Quality	82.68% ⭐	82.55% ⭐	-0.13% 👎

Other metrics	Before	After	Change
Lines	1688	1888	200

Changed files	Quality Before	Quality After	Quality Change
lms/lmsdb/models.py	84.38% ⭐	84.61% ⭐	0.23% 👍
lms/lmsweb/init.py	56.91% 🙂	54.82% 🙂	-2.09% 👎
lms/lmsweb/views.py	74.64% 🙂	74.25% 🙂	-0.39% 👎
lms/lmsweb/tools/registration.py	86.90% ⭐	86.82% ⭐	-0.08% 👎
lms/models/errors.py	95.58% ⭐	94.91% ⭐	-0.67% 👎
tests/conftest.py	91.19% ⭐	90.90% ⭐	-0.29% 👎
tests/test_flask_limiter.py	83.28% ⭐	83.58% ⭐	0.30% 👍
tests/test_login.py	88.75% ⭐	87.61% ⭐	-1.14% 👎
tests/test_users.py	88.27% ⭐	87.52% ⭐	-0.75% 👎
tests/samples/config_copy.py	96.18% ⭐	96.18% ⭐	0.00%

Here are some functions in these files that still need a tune-up:

File	Function	Complexity	Length	Working Memory	Quality	Recommendation
lms/lmsweb/views.py	comment	13 🙂	202 😞	8 🙂	50.15% 🙂	Try splitting into smaller methods
lms/lmsweb/views.py	login	5 ⭐	124 😞	12 😞	57.29% 🙂	Try splitting into smaller methods. Extract out complex expressions
lms/lmsdb/models.py	Solution._base_next_unchecked	0 ⭐	95 🙂	20 ⛔	57.42% 🙂	Extract out complex expressions
lms/lmsweb/views.py	view	7 ⭐	134 😞	10 😞	57.80% 🙂	Try splitting into smaller methods. Extract out complex expressions
lms/lmsdb/models.py	User.notes	1 ⭐	92 🙂	18 ⛔	58.26% 🙂	Extract out complex expressions

Legend and Explanation

The emojis denote the absolute quality of the code:

• ⭐ excellent
• 🙂 good
• 😞 poor
• ⛔ very poor

The 👍 and 👎 indicate whether the quality has improved or gotten worse with this pull request.

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Please see our documentation here for details on how these metrics are calculated.

We are actively working on this report - lots more documentation and extra metrics to come!

Help us improve this quality report!