Update docs to --all-groups

[Dreamsorcerer]

Having moved development dependencies from the extras into groups, developers will now need to install the groups.

[greptile-apps]

Greptile Summary

This PR updates four documentation files to replace --all-extras with --all-groups following a migration of development dependencies (tests, lint, mypy) from optional extras into dependency groups. The install guides for macOS and Ubuntu now include an explicit uv sync --all-groups step so that mypy and the full test toolchain are available out of the box.

• docs/installation/osx.md and docs/installation/ubuntu.md: added uv sync --all-groups before the mypy and pytest steps, replacing the old comment that implied uv run alone was sufficient.
• docs/development/testing.md: swapped --all-extras to --all-groups in the self-hosted sync snippet; the opening sentence still only mentions the tests group and does not mention that --all-groups is now also needed for mypy/lint.
• README.md: updated the inline comment to reference --all-groups and adds mypy as a reason, consistent with the new guide wording.

Confidence Score: 4/5

Documentation-only change that correctly reflects the move from extras to groups; safe to merge.

The install guides and README are updated consistently. The one gap is that docs/development/testing.md's opening sentence still describes only the tests group being synced by uv run, without mentioning that --all-groups is now needed for mypy/lint — a developer relying solely on that file could miss the required sync step.

docs/development/testing.md — opening paragraph does not mention the new --all-groups requirement for mypy/lint.

Important Files Changed

Filename	Overview
README.md	Updated comment from --all-extras to --all-groups, adding mypy as a reason; no explicit uv sync --all-groups command shown, unlike the install guides
docs/development/testing.md	Swapped --all-extras to --all-groups with an updated comment; change is accurate and consistent with the self-hosted sync instructions
docs/installation/osx.md	Added explicit uv sync --all-groups step before mypy and pytest in the dev setup block; correctly ensures lint and test tools are available
docs/installation/ubuntu.md	Same change as osx.md — explicit uv sync --all-groups added before mypy/pytest; mirrors the macOS guide correctly

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Clone repo] --> B[uv sync --all-groups]
    B --> C{What do you need?}
    C -->|Type check| D[uv run mypy dimos]
    C -->|Default tests| E[uv run pytest --numprocesses=auto dimos]
    C -->|Self-hosted tests| F[uv sync --group tests-self-hosted]
    F --> G[uv run pytest -m self_hosted dimos]
    D --> H[Done]
    E --> H
    G --> H

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Comments Outside Diff (1)

1. docs/development/testing.md, line 3 (link)

   The opening sentence still says uv run syncs only the tests group and that "no upfront install" is needed, but this PR's broader context is that mypy/lint tools have moved into groups that uv run won't sync by default. A developer reading only this file will miss that uv sync --all-groups is now required for type-checking, not just for self-hosted tests.

_{Reviews (1): Last reviewed commit: "Update docs to --all-groups" | Re-trigger Greptile}

[leshy]

some issue with CI with this @Dreamsorcerer