Replace fatih/color with in-tree ANSI helpers

[pietern]

Summary

• Drops github.com/fatih/color as a direct dependency by migrating its ~14 call sites (bundle render, bundle run, cfgpickers, logstream, cmd/labs, experimental/aitools, experimental/ssh, python_mutator) to a small ANSI helper set.
• Adds libs/cmdio/color.go with cmdio.Red(ctx, msg)-style helpers and a RenderFuncMap(ctx) for templates. The gate matches fatih/color's historical stdout-TTY decision and degrades to plain text when ctx has no cmdIO attached.
• Stacks on top of Replace nwidger/jsoncolor with an in-tree colorizer #5170. ANSI constants shared across both colorizers now live in libs/cmdio/color.go.

No user-visible output changes — the new helpers emit byte-identical SGR sequences.

Test plan

• Manual smoke: databricks bundle validate against a bundle with errors and warnings (colored summary on TTY, uncolored when piped) and databricks current-user me -o json (colored on TTY, uncolored when piped through jq).

This pull request and its description were written by Isaac.

[github-actions]

Approval status: pending

/bundle/ - needs approval

5 files changed
Suggested: @denik
Also eligible: @anton-107, @lennartkats-db, @shreyas-goenka, @andrewnester, @janniklasrose

/cmd/labs/ - needs approval

Files: cmd/labs/project/fetcher.go, cmd/labs/project/installer.go, cmd/labs/project/project.go
Eligible: @alexott, @asnare

/experimental/aitools/ - needs approval

Files: experimental/aitools/cmd/install.go, experimental/aitools/lib/installer/installer.go
Suggested: @arsenyinfo
Also eligible: @pkosiec, @lennartkats-db, @MarioCadenas, @fjakobs, @jamesbroadhead, @Shridhad, @atilafassina, @keugenek, @igrekun, @pffigueiredo, @ditadi, @calvarjorge

/libs/apps/ - needs approval

4 files changed
Suggested: @arsenyinfo
Also eligible: @pkosiec, @MarioCadenas, @fjakobs, @jamesbroadhead, @Shridhad, @atilafassina, @keugenek, @igrekun, @pffigueiredo, @ditadi, @calvarjorge

/libs/cmdio/ - needs approval

8 files changed
Suggested: @simonfaltum
Also eligible: @tanmay-db, @renaudhartert-db, @hectorcast-db, @parthban-db, @Divyansh-db, @tejaskochar-db, @mihaimitrea-db, @chrisst, @rauchy

/libs/databrickscfg/ - needs approval

Files: libs/databrickscfg/cfgpickers/clusters.go, libs/databrickscfg/cfgpickers/warehouses.go, libs/databrickscfg/cfgpickers/warehouses_test.go
Suggested: @simonfaltum
Also eligible: @tanmay-db, @renaudhartert-db, @hectorcast-db, @parthban-db, @Divyansh-db, @tejaskochar-db, @mihaimitrea-db, @chrisst, @rauchy

/libs/log/ - needs approval

Files: libs/log/handler/colors.go, libs/log/handler/colors_test.go, libs/log/handler/friendly.go
Suggested: @simonfaltum
Also eligible: @tanmay-db, @renaudhartert-db, @hectorcast-db, @parthban-db, @Divyansh-db, @tejaskochar-db, @mihaimitrea-db, @chrisst, @rauchy

General files (require maintainer)

4 files changed
Based on git history:

• @simonfaltum -- recent work in libs/cmdio/, ./, experimental/aitools/lib/installer/

_{Any maintainer (@andrewnester, @anton-107, @denik, @shreyas-goenka, @simonfaltum, @renaudhartert-db) can approve all areas.
See OWNERS for ownership rules.}

[github-actions]

Approval status: pending

/bundle/ - needs approval

5 files changed
Suggested: @denik
Also eligible: @anton-107, @lennartkats-db, @shreyas-goenka, @andrewnester, @janniklasrose

/cmd/labs/ - needs approval

Files: cmd/labs/project/fetcher.go, cmd/labs/project/installer.go, cmd/labs/project/project.go
Eligible: @alexott, @asnare

/experimental/aitools/ - needs approval

Files: experimental/aitools/cmd/install.go, experimental/aitools/lib/installer/installer.go
Suggested: @arsenyinfo
Also eligible: @pkosiec, @lennartkats-db, @MarioCadenas, @fjakobs, @jamesbroadhead, @Shridhad, @atilafassina, @keugenek, @igrekun, @pffigueiredo, @ditadi, @calvarjorge

/libs/apps/ - needs approval

4 files changed
Suggested: @arsenyinfo
Also eligible: @pkosiec, @MarioCadenas, @fjakobs, @jamesbroadhead, @Shridhad, @atilafassina, @keugenek, @igrekun, @pffigueiredo, @ditadi, @calvarjorge

/libs/cmdio/ - needs approval

8 files changed
Suggested: @simonfaltum
Also eligible: @tanmay-db, @renaudhartert-db, @hectorcast-db, @parthban-db, @Divyansh-db, @tejaskochar-db, @mihaimitrea-db, @chrisst, @rauchy

/libs/databrickscfg/ - needs approval

Files: libs/databrickscfg/cfgpickers/clusters.go, libs/databrickscfg/cfgpickers/warehouses.go, libs/databrickscfg/cfgpickers/warehouses_test.go
Suggested: @simonfaltum
Also eligible: @tanmay-db, @renaudhartert-db, @hectorcast-db, @parthban-db, @Divyansh-db, @tejaskochar-db, @mihaimitrea-db, @chrisst, @rauchy

/libs/log/ - needs approval

Files: libs/log/handler/colors.go, libs/log/handler/colors_test.go, libs/log/handler/friendly.go
Suggested: @simonfaltum
Also eligible: @tanmay-db, @renaudhartert-db, @hectorcast-db, @parthban-db, @Divyansh-db, @tejaskochar-db, @mihaimitrea-db, @chrisst, @rauchy

General files (require maintainer)

4 files changed
Based on git history:

• @simonfaltum -- recent work in libs/cmdio/, ./, experimental/aitools/lib/installer/

_{Any maintainer (@andrewnester, @anton-107, @denik, @shreyas-goenka, @simonfaltum, @renaudhartert-db) can approve all areas.
See OWNERS for ownership rules.}