Improve logfire inspect

[Kludex]

This PR adds the following arguments to logfire inspect:

• --explain: Shouldn't be used frequently, but it helps, because it mentions the reason why the opentelemetry package was suggested.
• --ignore-package: Used to ignore packages that user don't want to instrument.
• --ignore-standard-library: Redundant if you use --ignore-package urllib --ignore-package sqlite3, but helps as a shortcut.

I've added a logic to handle packages that are only required by opentelemetry, like what is mentioned here: #330.

---

Suggestions welcome on how to test this.

[cloudflare-workers-and-pages]

Deploying logfire-docs with    Cloudflare Pages

Latest commit:	9495827
Status:	✅  Deploy successful!
Preview URL:	https://b8e4b353.logfire-docs.pages.dev
Branch Preview URL:	https://kludex-improve-inspect-comma.logfire-docs.pages.dev

View logs

[Kludex]

This now fails because we handle the logic in a more assertive way.

[codecov]

Codecov Report

Attention: Patch coverage is 58.53659% with 17 lines in your changes missing coverage. Please review.

Project coverage is 99.83%. Comparing base (8434258) to head (9495827).

Files with missing lines	Patch %	Lines
logfire/_internal/cli.py	57.50%	11 Missing and 6 partials ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##              main     #727      +/-   ##
===========================================
- Coverage   100.00%   99.83%   -0.17%     
===========================================
  Files          139      139              
  Lines        11206    11235      +29     
  Branches      1572     1583      +11     
===========================================
+ Hits         11206    11217      +11     
- Misses           0       12      +12     
- Partials         0        6       +6     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[alexmojaki]

This doesn't pick up packages that are merely installed with e.g. uv pip install:

$ uv venv
Using CPython 3.12.6 interpreter at: /Users/alex/.pyenv/versions/3.12.6/bin/python
Creating virtual environment at: .venv
Activate with: source .venv/bin/activate
$ source .venv/bin/activate
$ uv pip install fastapi sqlalchemy logfire
Resolved 34 packages in 6ms
Installed 34 packages in 66ms
$ python -m logfire inspect  # works with logfire from pypi

The following packages from your environment have an OpenTelemetry instrumentation that is not installed:
┏━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Package    ┃ OpenTelemetry instrumentation package    ┃
┡━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┩
│ fastapi    │ opentelemetry-instrumentation-fastapi    │
│ requests   │ opentelemetry-instrumentation-requests   │
│ sqlalchemy │ opentelemetry-instrumentation-sqlalchemy │
│ sqlite3    │ opentelemetry-instrumentation-sqlite3    │
│ urllib     │ opentelemetry-instrumentation-urllib     │
│ urllib3    │ opentelemetry-instrumentation-urllib3    │
└────────────┴──────────────────────────────────────────┘

$ uv pip install -e ../logfire  # install this branch
Uninstalled 1 package in 5ms
Installed 1 package in 1ms
 - logfire==2.11.0
 + logfire==2.11.0 (from file:///Users/alex/work/logfire)
$ python -m logfire inspect
# No output

[alexmojaki]

And when I use it in the logfire venv it tells me to install opentelemetry-instrumentation-aiohttp-client even though it's already installed.