CI canonicalization: GitHub Actions, TagBot/CompatHelper/Dependabot, compat bounds, Runic formatting, typo fixes

[ChrisRackauckas-Claude]

This PR should be ignored until reviewed by @ChrisRackauckas.

This is the CI canonicalization promised in #35 (and it completes what #30 and #31 started). It builds on top of the merged JLL adoption (#36). It deliberately does not touch the memory-model items deferred in #35, and it does not change any solver code semantics.

What changed

CI / automation (.github/)

• Tests.yml — test matrix on Linux/Windows/macOS with Julia 1, plus min (resolves to the 1.10 compat floor) and pre on Linux, via the public reusable workflow SciML/.github/.github/workflows/tests.yml@v1 (same pinning convention as SciML/Sundials.jl, which is the model binary-wrapper repo). Includes Codecov upload; without a CODECOV_TOKEN secret the upload step is best-effort and never fails CI.
• Downgrade.yml — tests the declared compat lower bounds on Julia LTS (reusable workflow).
• FormatCheck.yml — Runic format check (reusable workflow).
• SpellCheck.yml — typos check (reusable workflow), configured by _typos.toml.
• TagBot.yml / CompatHelper.yml — standard upstream templates (these only need the default GITHUB_TOKEN, so they work as-is outside the SciML org).
• dependabot.yml — weekly GitHub Actions version updates.
• Removed the dead .travis.yml and appveyor.yml.

The four reused workflows are public and callable cross-org, so this repo gets SciML's maintained CI logic without moving anywhere; nothing in them assumes SciML-org secrets.

Project.toml

• Compat entries for all dependencies, including standard libraries, per the post-1.10 General registry requirements.
• julia = "1.10" (LTS) floor: ODEInterface_jll = "0.0.2" (the JLL version current master loads) itself requires Julia ≥ 1.10, so 1.10 is the real floor.
• Version left at 0.5.1 (unregistered; master already bumped it after Fix Julia 1.12 compatibility issue with ODEInterface_jll loading #36). Note for review: since this drops Julia < 1.10 support relative to registered 0.5.0, you may prefer releasing this as 0.6.0 instead — I left the number alone deliberately.

Formatting

• Ran Runic.jl over all 56 Julia files (the bulk of the diff, as announced in Possibly migrate to SciML for maintenance? #35). Purely mechanical, AST-preserving.
• The two ROBER example files contained Julia 0.x-era 10.^[...] syntax that is a parse error on every Julia 1.x — fixed to 10.0 .^ [...] (separate commit) so the files parse at all.

Typos

• Fixed genuine typos in docstrings, Markdown docs, and comments (e.g. "informations" → "information", "licsense" → "license", "successfull" → "successful").
• Untouched: LICENSE.md, every Fortran source file (*.f, *.f90), and all author attributions — _typos.toml excludes them from the check, and allowlists Fortran identifiers (contex, contro, implct, nd) and citation names (Stoer, Numer. Math.) so CI never "corrects" them. README/Project.toml attribution to @luchr is unchanged.

README

• Replaced the dead Travis/AppVeyor/Coveralls badges with GitHub Actions + Codecov badges.

Local verification

Ran on this branch, both passing (Testing ODEInterface tests passed):

• julia +1.10 (1.10.11): Pkg.build("ODEInterface"); Pkg.test() — all 11 test sets pass
• julia +release (1.12.5): Pkg.build("ODEInterface"); Pkg.test() — all 11 test sets pass

Unmodified master was also tested on both versions first (green), so any CI failure surfaced here is attributable to this PR. All files pass runic --check, typos exits clean, and the workflows pass actionlint.

Notes / follow-ups

• Codecov coverage upload will work better if a CODECOV_TOKEN repo secret is added (optional).
• TagBot needs no setup; CompatHelper runs on a daily cron with the default token.
• Dependabot auto-merge was intentionally not added (repo-owner policy decision).

Closes #30. Closes #31.

🤖 Generated with Claude Code

[ChrisRackauckas-Claude]

Closing in favor of splitting this into two focused PRs, as requested, to separate the CI/infrastructure pieces from the actual code changes:

• Code cleanup (Runic formatting + Julia-0.x syntax fix + typo fixes + _typos.toml): Code cleanup: Runic formatting and typo fixes #38
• CI canonicalization (GitHub Actions workflows, TagBot/CompatHelper/Dependabot, Project.toml compat bounds, README badges, Travis/AppVeyor removal): CI canonicalization: GitHub Actions, TagBot/CompatHelper/Dependabot, compat bounds, badges #39

#39 depends on #38 (its FormatCheck/SpellCheck checks enforce the standards applied in #38), so #38 should be merged first. Both are drafts and should be ignored until reviewed by @ChrisRackauckas.