DOC: improvements to developers documentation - #732

* DOC: improvements to developers documentation

* MNT: git rename a few files from the root directory

* DOC: more upgrades to development docs

* DEV: create script to delete local branches that no longer exist on remote

* DOC: I followed the step by step, looked at other parts of the documentation, and didn't find anything to correct or improve. I think it's fine as it is. I added a model to requirements.txt, which was missing when I ran the make html command.

* DOC: Update developer docs on sphinx building.

* DOC: Clarify testing structure on testing docs.

* DOC: Re-run docs requirements freeze.

* DOC: Introduce Conflicts Guideline and update First PR.

* DOC: fixing typos on development docs.

* DOC: Solve review comments of dev docs.

* DOC: final touches to developers documentation

* DOC: update cSpell configuration to enable additional file types

* DEV: move docker ignore file

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Co-authored-by: Julio Machado <[email protected]>
Co-authored-by: Pedro Bressan <[email protected]>
Co-authored-by: Lucas de Oliveira Prates <[email protected]>

…ove (#1139)

* docker: mount the repository root in compose, not the docker folder

#732 moved docker-compose.yml into docker/. Compose resolves relative
host paths against the compose file's own directory, so `- .:/app`
mounts docker/, which has no pyproject.toml and no requirements-tests.txt
for the services to install.

* docker: raise the compose service to the python floor the package declares

#857 moved requires-python to >=3.10; pip declines the install on 3.9.
Renamed the service key so it does not outlive the version again.

* docker: pin the base image to python:3.14

python:latest and python:3.14 are the same digest today, so the image
does not change. 3.14 is the ceiling of the test matrix, and a pinned
tag is one renovate can see and bump.

* docs: describe the docker layout as it is after #732

The build command needs a repository-root context to find
requirements.txt, compose runs from inside docker/, and the file
tests 3.10 and 3.12 rather than 3.9 and 3.12.